| There are 44 English roots starting with [O]. There are 111 words in the top 5,000 most frequently used English words. There are 526 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 **** | oceanographer | |
| oct | eight, eight times |
October ** | octad, octadic, Octagon, octahedron, octameter, octangular, octarchy, octaval, octennial, octode, octogenarian, octogenary, octogesimal, octonary, octopus, octovir |
|
| od (od-, hod-) |
way | episode ****, method ****, methodical ☆, period **** | anode, cathodal, cathode, cathodic, cathodical, diode, electrode, episodic, episodically, ergodic, exodos, exodus, heptode, herpolhode, hode, hodometer, hydathode, methodic, methodically, Methodism, Methodist, methodological, methodologically, methodologist, methodology, octode, odometer, odor, ozone, parodos, pentode, periodic, periodical, periodically, periodicity, synod, tetrode, triode |
|
| odd | odd | odd ****, oddly **, odds *** | oddity, oddness | |
| ode | song | comedy ***, melody **, ode ☆, tragedy *** | comedial, comedian, melodic, melodious, melodize |
|
| odi | hate | annoy ***, annoyance ☆, annoyed ** | ennui, odious | |
| off (off, of) |
away, from, apart |
of ****, off ****, offspring ** | layoff, o'clock, offload, offset, offside, offstage, out-of-control, tradeoff, trade-off |
|
| office | office, work-doing |
office ****, officer ****, official ****, officially *** |
nonofficial, officialdom, officialize, officiant, officiary, officiate, officious |
|
| often | often | often **** | ||
| Oh | Oh | Oh **** | ||
| oil | oil | oil ****, petrol *** | oilily, oiliness, oil-like, oily, olivaceous, olivary, olive, olivette |
|
| OK (OK, Okay) |
Okay | OK ****, Okay *** | ||
| old | old | elderly ****, old ****, olden ☆ | elder, eldership, older, oldish, oldness |
|
| olesc (olesc, alesc) |
increase, grow up |
adult ****, coalition *** | adolesce, adolescence, adolescent, adolescently, adulthood, adultlike, adultly, adultness, coalitional, coalitioner, coalitionist, olesc |
| omni | all | bus ****, omnibus ☆ | omnipotent, omnipresent, omniscient, omnivore |
|
| one | one | anyone ****, eleven ***, everyone ****, none ****, once ****, one ****, only ****, someone **** |
Roshni, twenty-one | |
| oner | burden, load | patron **, patronise ☆, patronize ☆ | exonerate, exoneration, onerous, onus, patronal, patronising, patronisingly, patronizing, patronizingly, patronly |
|
| onym | name, word | anonymous ** | 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 ****, opening ***, openly *** | openable, openness | |
| oper (oper-, opera-) |
work, labor, exertion |
cooperate ***, cooperation ***, cooperative **, opera **, operate ****, operation ****, opus ☆ |
cooperationist, co-operationist, cooperatively, co-operatively, cooperativeness, co-operativeness, cooperator, co-operator, inoperable, oper, operatic |
|
| opinion | opinion | opinion **** | ||
| ops (ops-, opt-) |
eye | amblyopia **, optic ☆, optical ☆, optics ☆ | anopia, autopsy, biopsy, catadioptrics, catoptrics, catoptromancy, catoptrophobia, cyclops, diopter, dioptre, dioptrics, diplopia, eisoptrophobia, emmetropia, Europe, European, Europeanism, hemianopsia, myopia, opsoclonus, optically, optokinetic, panopticon, pleoptics, synopsis, synoptic, tritanopia |
|
| opt | choose | adopt ****, opt ***, option **** | adopted, adoptee, adoption, adoptive, coopt, cooptation, co-option, nonoptional, optation, optative, optional, optionality |
|
| optim | best | optimism **, optimistic *** | optim, optimal, optimist, optimistically, optimum |
|
| or | or | nor ****, or **** | ||
| or (or-) |
mouth | oral ** | adosculation, inosculate, inosculation, interosculate, intraoral, orally, orifice, os, osculant, osculum, peroral |
|
| ora (ora-) |
speak, pray, plead |
oratory ☆ | adoration, adore, exorable, inexorable, oracle, oracular, oraculum, orate, oration, orator, oratorio, orison, perorate, peroration, perorator |
| orange | orange | orange *** | ||
| orb | circle, wheel track |
orbit ** | exorbitance, exorbitant, exorbitantly, orbital, orbitally |
|
| order | order, begin | coordinate **, coordination ☆, coordinator **, disorder ***, extraordinary ****, order ****, ordinary **** |
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 ***, organic ***, organisation ****, organise ☆, organiser ☆, organism **, organization ****, organize ****, organizer ** |
disorganise, heterorganic, homorganic, microorganism, organised, organising, organist, organized, organogenesis, organoid, organoleptic, orgiastic |
|
| ori (ori-, ort-) |
rise, get up, appear |
orientation **, origin ****, original ****, originally ****, originate ** |
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 ****, other ****, otherwise **** | others | |
| oti | ease, leisure | negotiate **, negotiation *** | ||
| ou | not | utopia ☆ | ||
| out (out, ut) |
out | about ****, but ****, out ****, outcome ****, outcry ☆, outdoor ***, outdoors ***, outer ***, outline ***, outlook **, output **, outside ****, outsider **, outward ☆, throughout ****, without **** |
burnout, checkout, layout, outburst, outcross, outdate, outdated, outgoing, outland, outlandish, outlandishly, outlandishness, outlaw, outlet, outlying, outnumber, out-of-control, outperform, outreach, outstanding, outwardly, outweigh |
|
| ove | over, on high | above **** | ||
| oven | oven | oven **** | ||
| over | over | over ****, overall ****, overcome ***, overeat ☆, overlook **, overnight ***, overtake ☆, overwhelm ** |
makeover, overact, overaction, overactive, overbear, overbearing, overblow, overblown, overcoat, overcomer, overconsume, overconsumption, overeater, overestimate, overestimation, overpopulation, overtime, overview, overwhelming, overwhelmingly, overworked |
|
| owe | owe | ought ***, owe *** | ||
| ox (ox-, oxo-) |
sharp, pointed, acid |
oxide ☆, oxidize ☆, oxygen *** | anoxia, anoxic, antioxidant, dioxide, hypoxia, monoxide, oxidant, oxidic, oxidisation, oxidization, oxidizer, oxyanion, oxyhalide, oxymoron, oxyntic, oxytone, paroxysm, pentoxide, polyoxide, tetraoxygen, tetroxide, trioxide |
(end)
