| obovate | (adjective) (of a leaf shape) egg-shaped with the narrower end at the base | - |
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| obsolete | (adjective) no longer in use | Synonyms: disused |
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| (adjective) old; no longer valid or fashionable | Synonyms: out-of-date, outdated, superannuated |
| obstinate | (adjective) tenaciously unwilling or marked by tenacious unwillingness to yield | Synonyms: stubborn, unregenerate |
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| (adjective) resistant to guidance or discipline | Synonyms: contrary, perverse, wayward |
| (adjective) stubbornly persistent in wrongdoing | Synonyms: cussed, obdurate, unrepentant |
| operculate | (adjective) having an operculum | Synonyms: operculated |
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| opposite | (adjective) of leaves etc; growing in pairs on either side of a stem | Synonyms: paired |
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| (adjective) characterized by opposite extremes; completely opposed | Synonyms: diametric, diametrical, polar |
| (adjective) the other one of a complementary pair | - |
| (adjective) being directly across from each other; facing | - |
| (adjective) altogether different in nature or quality or significance | - |
| (adjective) moving or facing away from each other | - |
| orbiculate | (adjective) circular or nearly circular | Synonyms: orbicular |
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| ornate | (adjective) marked by elaborate rhetoric and elaborated with decorative details | Synonyms: flowery |
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| ossiculate | (adjective) pertaining to the ossicles in the middle ear | Synonyms: ossicular |
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| outcaste | (adjective) not belonging to or having been expelled from a caste and thus having no place or status in society | Synonyms: casteless |
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| ovate | (adjective) rounded like an egg | Synonyms: egg-shaped, elliptic, elliptical, oval-shaped, oval, oviform, ovoid, prolate |
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| (adjective) of a leaf shape; egg-shaped with the broader end at the base | - |
| overdelicate | (adjective) extremely delicate | - |
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| palmate | (adjective) of a leaf shape; having leaflets or lobes radiating from a common point | Synonyms: palm-shaped |
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| (adjective) (of the feet of water birds) having three toes connected by a thin fold of skin | - |
| palpebrate | (adjective) having eyelids | - |
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| pandurate | (adjective) (of a leaf shape) having rounded ends and a contracted center | Synonyms: fiddle-shaped, panduriform |
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| paniculate | (adjective) having a panicle | - |
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| papillate | (adjective) resembling or covered with papillae | - |
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| paripinnate | (adjective) (of a leaf shape) pinnate with a pair of leaflets at the apex | Synonyms: abruptly-pinnate, even-pinnate |
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| particulate | (adjective) composed of distinct particles | - |
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| passionate | (adjective) having or expressing strong emotions | - |
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| pectinate | (adjective) like a comb | - |
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| pedate | (adjective) of a leaf shape; having radiating lobes, each deeply cleft or divided | - |
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| (adjective) having or resembling a foot | - |
| pedunculate | (adjective) having or growing on or from a peduncle or stalk | Synonyms: stalked |
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| peltate | (adjective) (of a leaf shape) round, with the stem attached near the center of the lower surface rather than the margin (as a nasturtium leaf for example) | Synonyms: shield-shaped |
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| pennate | (adjective) having feathered wings | - |
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| penultimate | (adjective) second last | Synonyms: next-to-last |
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| perfoliate | (adjective) (of a leaf) having the base united around (and apparently pierced by) the stem | - |
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| perforate | (adjective) having a hole cut through | Synonyms: perforated, pierced, punctured |
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| petite | (adjective) very small | Synonyms: bantam, diminutive, flyspeck, lilliputian, midget, tiny |
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| pinnate | (adjective) (of a leaf shape) featherlike; having leaflets on each side of a common axis | Synonyms: pinnated |
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| pistillate | (adjective) bearing or consisting of carpels | Synonyms: carpellate |
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| (adjective) having gynoecia, or pistils, the ovule-bearing organ of a seed plant | - |
| planate | (adjective) having been flattened | Synonyms: flattened |
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| plumate | (adjective) having an ornamental plume or feathery tuft | Synonyms: plumed, plumose |
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| polite | (adjective) showing regard for others in manners, speech, behavior, etc. | - |
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| (adjective) not rude; marked by satisfactory (or especially minimal) adherence to social usages and sufficient but not noteworthy consideration for others | Synonyms: civil |
| (adjective) marked by refinement in taste and manners | Synonyms: civilised, civilized, cultivated, cultured, genteel |
| postgraduate | (adjective) of or relating to studies beyond a bachelor's degree | Synonyms: graduate |
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| precipitate | (adjective) done with very great haste and without due deliberation | Synonyms: hasty, overhasty, precipitant, precipitous |
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| predestinate | (adjective) established or prearranged unalterably | Synonyms: foreordained, predestined |
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| predominate | (adjective) having superior power and influence | Synonyms: overriding, paramount, predominant, preponderant, preponderating |
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| preliterate | (adjective) not yet having acquired the ability to read and write | - |
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| (adjective) used of a society that has not developed writing | Synonyms: nonliterate |
| prerequisite | (adjective) required as a prior condition or course of study | - |
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| private | (adjective) confined to particular persons or groups or providing privacy | - |
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| (adjective) not expressed | Synonyms: secret |
| (adjective) concerning one person exclusively | Synonyms: individual |
| (adjective) concerning things deeply private and personal | Synonyms: intimate |
| profligate | (adjective) unrestrained by convention or morality | Synonyms: debauched, degenerate, degraded, dissipated, dissolute, fast, libertine, riotous |
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| (adjective) recklessly wasteful | Synonyms: extravagant, prodigal, spendthrift |
| prolate | (adjective) having the polar diameter greater than the equatorial diameter | Synonyms: watermelon-shaped |
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| (adjective) rounded like an egg | Synonyms: egg-shaped, elliptic, elliptical, oval-shaped, oval, ovate, oviform, ovoid |
| proportionate | (adjective) being in due proportion | - |
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| (adjective) exhibiting equivalence or correspondence among constituents of an entity or between different entities | Synonyms: harmonious, symmetrical |
| (adjective) agreeing in amount, magnitude, or degree | - |
| prostate | (adjective) relating to the prostate gland | Synonyms: prostatic |
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| prostrate | (adjective) stretched out and lying at full length along the ground | Synonyms: flat |
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| (adjective) lying face downward | Synonyms: prone |
| proximate | (adjective) closest in degree or order (space or time) especially in a chain of causes and effects | - |
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| (adjective) very close in space or time | - |
| pseudohermaphrodite | (adjective) having internal reproductive organs of one sex and external sexual characteristics of the other sex | Synonyms: pseudohermaphroditic |
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| pustulate | (adjective) (of complexion) blemished by imperfections of the skin | Synonyms: acned, pimpled, pimply |
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| quadrate | (adjective) having four sides and four angles | - |
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| quadripartite | (adjective) involving four parties | Synonyms: four-party |
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| quadruplicate | (adjective) having four units or components | Synonyms: four-fold, fourfold, quadruple, quadruplex |
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| quaternate | (adjective) consisting of or especially arranged in sets of four | Synonyms: quaternary |
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| quinquefoliate | (adjective) (of a leaf shape) having five leaflets | - |
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| radiate | (adjective) having rays or ray-like parts as in the flower heads of daisies | - |
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| (adjective) arranged like rays or radii; radiating from a common center | Synonyms: radial, stellate |
| ramate | (adjective) having branches | Synonyms: branched, branching, ramose, ramous |
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| recondite | (adjective) difficult to penetrate; incomprehensible to one of ordinary understanding or knowledge | Synonyms: abstruse, deep |
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| recurvate | (adjective) curved backward or inward | Synonyms: recurved |
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| regenerate | (adjective) reformed spiritually or morally | - |
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| reincarnate | (adjective) having a new body | - |
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| remote | (adjective) far apart in relevance or relationship or kinship | Synonyms: distant |
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| (adjective) inaccessible and sparsely populated | Synonyms: outback |
| (adjective) unlikely to occur | Synonyms: outside |
| (adjective) located far away spatially | Synonyms: distant |
| (adjective) separate or apart in time | Synonyms: distant, removed |
| replete | (adjective) (followed by `with') deeply filled or permeated | Synonyms: imbued, instinct |
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| (adjective) filled to satisfaction with food or drink | Synonyms: full |
| reprobate | (adjective) deviating from what is considered moral or right or proper or good | Synonyms: depraved, perverse, perverted |
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| requisite | (adjective) necessary for relief or supply | Synonyms: needed, needful, required |
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| resolute | (adjective) firm in purpose or belief; characterized by firmness and determination | - |
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| (adjective) characterized by quickness and firmness | Synonyms: unhesitating |
| reticulate | (adjective) resembling or forming a network | Synonyms: reticular |
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| roseate | (adjective) of something having a dusty purplish pink color | Synonyms: rosaceous, rose |
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| rostrate | (adjective) having a beak or beaklike snout or proboscis | - |
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| runcinate | (adjective) having incised margins with the lobes or teeth pointing toward the base; as dandelion leaves | - |
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| sacculate | (adjective) formed with or having saclike expansions | Synonyms: sacculated |
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| sagittate | (adjective) (of a leaf shape) like an arrow head without flaring base lobes | Synonyms: arrow-shaped, sagittiform |
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| satellite | (adjective) surrounding and dominated by a central authority or power | - |
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| satiate | (adjective) supplied (especially fed) to satisfaction | Synonyms: satiated |
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| saute | (adjective) fried quickly in a little fat | Synonyms: sauteed |
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| sedate | (adjective) characterized by dignity and propriety | Synonyms: staid |
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| (adjective) dignified and somber in manner or character and committed to keeping promises | Synonyms: grave, sober, solemn |
| semiliterate | (adjective) literate but poorly informed | - |
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| (adjective) barely able to read and write | - |
| (adjective) able to read but not to write | - |
| semiprivate | (adjective) confined to a small number of hospital patients | - |
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| sensate | (adjective) having physical sensation | - |
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| separate | (adjective) independent; not united or joint | - |
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| (adjective) standing apart; not attached to or supported by anything | Synonyms: freestanding |
| (adjective) separated according to race, sex, class, or religion | - |
| (adjective) have the connection undone; having become separate | Synonyms: disjoined |
| septate | (adjective) of or relating to a septum | Synonyms: septal |
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| serrate | (adjective) notched like a saw with teeth pointing toward the apex | Synonyms: notched, saw-toothed, serrated, toothed |
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| serrulate | (adjective) minutely serrated | - |
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| sinuate | (adjective) curved or curving in and out | Synonyms: sinuous, wiggly |
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| (adjective) having a strongly waved margin alternately concave and convex | - |
| spatulate | (adjective) (of a leaf shape) having a broad rounded apex and a narrow base | Synonyms: spatula-shaped |
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| spicate | (adjective) having or relating to spikes | - |
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| staminate | (adjective) capable of fertilizing female organs | Synonyms: antheral |
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| statute | (adjective) enacted by a legislative body | Synonyms: codified |
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| stellate | (adjective) arranged like rays or radii; radiating from a common center | Synonyms: radial, radiate |
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| striate | (adjective) marked with stria or striations | - |
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| subacute | (adjective) less than acute; relating to a disease present in a person with no symptoms of it | - |
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| sublimate | (adjective) made pure | - |
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| subordinate | (adjective) lower in rank or importance | Synonyms: low-level |
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| (adjective) subject or submissive to authority or the control of another | - |
| (adjective) (of a clause) unable to stand alone syntactically as a complete sentence | Synonyms: dependent |
| substitute | (adjective) artificial and inferior | Synonyms: ersatz |
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| (adjective) serving or used in place of another | Synonyms: alternate, alternative |
| (adjective) capable of substituting in any of several positions on a team | Synonyms: utility |
| sulcate | (adjective) having deep narrow furrows or grooves | - |
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| superordinate | (adjective) of higher rank or status or value | - |
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| surrogate | (adjective) providing or receiving nurture or parental care though not related by blood or legal ties | Synonyms: foster |
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| svelte | (adjective) being of delicate or slender build | Synonyms: slender, slight, slim |
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| temperate | (adjective) not extreme in behavior | - |
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| (adjective) (of weather or climate) free from extremes; mild; or characteristic of such weather or climate | - |
| (adjective) not extreme | Synonyms: moderate |
| terete | (adjective) especially of plant parts; cylindrical and tapering | - |
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| ternate | (adjective) (of a leaf shape) consisting of three leaflets or sections | - |
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| testate | (adjective) having made a legally valid will before death | - |
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