11-letter words starting with op
- opinionator — (obsolete) An opinionated person; one given to conjecture.
- opinionized — Simple past tense and past participle of opinionize.
- opisthokont — (biology) Any of very many eukaryotes whose flagellate cells propel themselves with a single posterior flagellum.
- opisthosoma — the abdomen of a spider or other arachnid
- opium poppy — a Eurasian poppy, Papaver somniferum, having white, pink, red, or purple flowers, cultivated as the source of opium, for its oily seeds, and as an ornamental.
- oppenheimer — J(ulius) Robert, 1904–67, U.S. nuclear physicist.
- oppertunity — Misspelling of opportunity.
- oppignorate — to promise or give as security
- opportunely — appropriate, favorable, or suitable: an opportune phrase for the occasion.
- opportunism — the policy or practice, as in politics, business, or one's personal affairs, of adapting actions, decisions, etc., to expediency or effectiveness regardless of the sacrifice of ethical principles.
- opportunist — a person who practices opportunism, or the policy of adapting actions, decisions, etc., to effectiveness regardless of the sacrifice of ethical principles: He is an extreme opportunist and always thinks the ends justify the means.
- opportunity — an appropriate or favorable time or occasion: Their meeting afforded an opportunity to exchange views.
- oppositions — the action of opposing, resisting, or combating.
- oppressions — Plural form of oppression.
- opprobrious — conveying or expressing opprobrium, as language or a speaker: opprobrious invectives.
- oppugnation — Opposition.
- oppurtunity — Misspelling of opportunity.
- opthamology — Misspelling of ophthalmology.
- optic nerve — either one of the second pair of cranial nerves, consisting of sensory fibers that conduct impulses from the retina to the brain.
- optical art — op art.
- optimizable — Capable of being optimized.
- optionality — left to one's choice; not required or mandatory: Formal dress is optional.
- optocoupler — An optoisolator.
- optokinetic — relating to a reflex whereby the eye follows a moving object
- optometrist — a licensed professional who practices optometry.