| There are 41 English roots starting with [O]. There are 124 words in the top 5,000 most frequently used English words. There are 530 words in total. |
 Clicking on these marks will take you to the root-specific detail page. To search within the page, press [Ctrl+F] and enter your search word. |
| ★★★★(top 2,000) ★★★(top 3,500) ★★(top 4,500) ☆(top 6,000) |
| Root | Meaning | Words(Top5,000) | Other words | |
| ocean | ocean | ocean ****[1393] | oceanographer | |
| oct | eight, eight times |
October **[3822] | octad, octadic, Octagon, octahedron, octameter, octangular, octarchy, octaval, octennial, octode, octogenarian, octogenary, octogesimal, octonary, octopus, octovir |
|
| od (od-, hod-) |
|
way | episode ****[1892], method ****[1217], period ****[936] |
anode, cathodal, cathode, cathodic, cathodical, diode, electrode, episodic, episodically, ergodic, exodos, exodus, heptode, herpolhode, hode, hodometer, hydathode, methodic, methodical, methodically, Methodism, Methodist, methodological, methodologically, methodologist, methodology, octode, odometer, odor, ozone, parodos, pentode, periodic, periodical, periodically, periodicity, synod, tetrode, triode |
| odd | |
odd, third, additional number, point of land, angle, triangle |
odd ****[1948], oddly **[4565], odds **[3577] |
oddity, oddness |
| ode | |
song | comedy ***[2677], melody **[4202], tragedy ***[3318] |
comedial, comedian, melodic, melodious, melodize, ode |
| odi | |
hate, hatred | annoy ***[2552], annoyed **[3774], annoying ***[3273] |
annoyance, ennui, odious |
| off (off, of) |
|
away, from, apart |
o'clock **[765], of ****[4], off ****[128], offspring **[3534] |
layoff, offload, offset, offside, offstage, out-of-control, tradeoff, trade-off |
| office | |
office, work-doing |
office ****[289], officer ****[1516], official ****[1084], officially ***[3141] |
nonofficial, officialdom, officialize, officiant, officiary, officiate, officious |
| often | often | often ****[146] | oftentimes | |
| oil | oil | oil ****[419], petrol ***[3211] | oilily, oiliness, oil-like, oily, olivaceous, olivary, olive, olivette |
|
| OK (OK, Okay) |
Okay | OK ****[897], Okay ***[676] | ||
| old | old | elderly ****[1949], old ****[125] | elder, eldership, olden, older, oldish, oldness |
|
| olesc (olesc, alesc) |
increase, grow up |
adult ****[1044], coalition ***[2968] | adolesce, adolescence, adolescent, adolescently, adulthood, adultlike, adultly, adultness, coalitional, coalitioner, coalitionist, olesc |
|
| omni | all | bus ****[523] | omnibus, omnipotent, omnipresent, omniscient, omnivore |
| one | |
one | anyone ****[1007], eleven ***[3299], everyone ****[877], none ****[1718], once ****[181], one ****[800], only ****[88], someone ****[832] |
Roshni, twenty-one |
| oner | burden, load | patron **[3538], patronise ☆[5446] | exonerate, exoneration, onerous, onus, patronal, patronising, patronisingly, patronize, patronizing, patronizingly, patronly |
|
| onym | name, word | anonymous **[4400] | acronym, allonym, anonym, antonym, autonym, caconym, cryptonym, eponym, eponymous, eponymy, euonym, homonym, hyperonym, hyponym, hyponymy, meronym, meronymy, metonym, metonymy, metronymic, onomatopoeia, onomatopoeic, onomatopoeically, onomatopoetic, onomatopoetically, onym, paronym, paronymous, pseudonym, pseudonymous, synonym, synonymous, synonymy, tautonym, tautonymous, tautonymy, troponym, troponymy, xenonym, xenonymy |
|
| open | |
open | open ****[247], opening ***[2854], openly ***[3115] |
openable, openness |
| oper (oper-, opera-) |
|
work, labor, exertion |
cooperate ***[3236], cooperation ***[2966], cooperative **[4107], opera **[4274], operate ****[1776], operation ***[2609], opus ☆[5255] |
cooperationist, co-operationist, cooperatively, co-operatively, cooperativeness, co-operativeness, cooperator, co-operator, inoperable, oper, operatic |
| opinion | opinion | opinion ****[1136] | ||
| ops (ops-, opt-) |
eye | amblyopia **, optical ☆[5137] | anopia, autopsy, biopsy, catadioptrics, catoptrics, catoptromancy, catoptrophobia, cyclops, diopter, dioptre, dioptrics, diplopia, eisoptrophobia, emmetropia, Europe, European, Europeanism, hemianopsia, myopia, opsoclonus, optic, optically, optics, optokinetic, panopticon, pleoptics, synopsis, synoptic, tritanopia |
|
| opt | |
choose | adopt ****[1740], opt ***[3223], option ****[1206] |
adopted, adoptee, adoption, adoptive, coopt, cooptation, co-option, nonoptional, optation, optative, optional, optionality |
| optim | best | optimism **[3558], optimistic ***[2485] |
optim, optimal, optimist, optimistically, optimum |
|
| or | or | nor ***[2550], or ****[22] | ||
| or (or-) |
mouth | oral **[4275] | adosculation, inosculate, inosculation, interosculate, intraoral, orally, orifice, os, osculant, osculum, peroral |
|
| ora (ora-) |
speak, pray, plead |
oratory ☆[5245] | adoration, adore, exorable, inexorable, oracle, oracular, oraculum, orate, oration, orator, oratorio, orison, perorate, peroration, perorator |
|
| orange | orange | orange ***[690] | ||
| orb | circle, wheel track |
orbit ***[3043] | exorbitance, exorbitant, exorbitantly, orbital, orbitally |
|
| orches | dance | orchestra **[3631] |
| order | |
order, begin | coordinate **[4552], coordination ☆[4982], coordinator **[4290], disorder ****[2074], extraordinary ****[1859], order ****[979], ordinary ****[1641] |
coordinal, extraordinaire, grandorder, incoordinate, incoordination, infraorder, inordinate, inordination, insubordinate, insubordination, magnorder, mirorder, ordain, ordainment, orderer, orderless, orderly, ordinal, ordinance, ordinand, ordinariate, ordinate, ordination, ordinative, ordnance, ornery, parvorder, preordain, preorder, preordination, primordial, quasiorder, reordain, reorder, reordination, suborder, subordinary, subordinate, subordination, superordain, superorder, superordinate, superordination |
| organ (organ-) |
|
implement, tool, instrument, organ |
organ ****[2160], organic ***[2950], organisation ****[1009], organise **[4000], organiser ☆[5201], organism ***[2949], organization ****[1415], organize ****[1821], organizer **[4601] |
disorganise, heterorganic, homorganic, microorganism, organised, organising, organist, organized, organogenesis, organoid, organoleptic, orgiastic |
| ori (ori-, ort-) |
|
rise, get up, appear |
orientation **[4489], origin ****[1689], original ****[1176], originally ****[1748], originate **[4042] |
aboriginal, Aborigine, abort, abortifacient, abortion, abortive, disorient, disorientation, orginate, ori, orient, oriental, Orientalia, orientate, orientational, orientationally, orientative, originality, origination, originative, originator, reorient, reorientation |
| other | |
other | another ****[813], other ****[57], otherwise ****[2055] |
others |
| oti | ease, leisure | negotiate **[3747], negotiation ***[3159] |
||
| ou | not | utopia ☆[4657] | ||
| out (out, ut) |
|
out | about ****[29], but ****[19], out ****[49], outcome ****[1766], outcry ☆[5210], outdoor ***[2834], outdoors ***[3184], outer ****[2275], outline ***[3312], outlook **[4095], output **[3794], outrage **[4128], outside ****[1093], outsider **[4214], throughout ****[1311], without ****[823] |
burnout, checkout, layout, outburst, outcross, outdate, outdated, outgoing, outland, outlandish, outlandishly, outlandishness, outlaw, outlet, outlying, outnumber, out-of-control, outpace, outperform, outrageous, outreach, outstanding, outward, outwardly, outweigh |
| ove | over, on high | above ****[1310] | ||
| oven | oven | oven ****[2421] | ||
| over | |
over | over ****[87], overall ****[1845], overcome ****[2150], overlook **[4136], overnight ***[3297], overtake ☆[4644], overwhelm **[3615] |
makeover, overact, overaction, overactive, overbear, overbearing, overblow, overblown, overcoat, overcomer, overconsume, overconsumption, overeat, overeater, overestimate, overestimation, overpopulation, overtime, overview, overwhelming, overwhelmingly, overworked |
| owe | owe | ought ***[2895], owe ***[2557] | ||
| ox (ox-, oxo-) |
sharp, pointed, acid |
oxide ☆[5380], oxygen ***[2505] | anoxia, anoxic, antioxidant, dioxide, hypoxia, monoxide, oxidant, oxidic, oxidisation, oxidization, oxidize, oxidizer, oxyanion, oxyhalide, oxymoron, oxyntic, oxytone, paroxysm, pentoxide, polyoxide, tetraoxygen, tetroxide, trioxide |
TERootList_O_v1.pdf
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