| OPENHANDED | • openhanded adj. Alternative form of open-handed. • openhanded adv. Alternative form of open-handed. • openhanded v. Simple past tense and past participle of openhand. |
| OPENNESSES | • opennesses n. Plural of openness. • OPENNESS n. the state of being open. |
| OPERAGOERS | • operagoers n. Plural of operagoer. • opera-goers n. Plural of opera-goer. • OPERAGOER n. one who attends the opera. |
| OPERAGOING | • operagoing adj. Attending opera performances. • OPERAGOING n. attending the opera. |
| OPERATIONS | • operations n. Plural of operation. • OPERATION n. the act of operating. |
| OPERATISED | • operatised v. Simple past tense and past participle of operatise. • OPERATISE v. to turn a play etc. into an opera, also OPERATIZE. |
| OPERATISES | • operatises v. Third-person singular simple present indicative form of operatise. • OPERATISE v. to turn a play etc. into an opera, also OPERATIZE. |
| OPERATIVES | • operatives n. Plural of operative. • OPERATIVE n. a worker, esp. one with special skills. |
| OPERATIZED | • operatized v. Simple past tense and past participle of operatize. • OPERATIZE v. to turn a play etc. into an opera, also OPERATISE. |
| OPERATIZES | • operatizes v. Third-person singular simple present indicative form of operatize. • OPERATIZE v. to turn a play etc. into an opera, also OPERATISE. |
| OPERCULARS | • operculars n. Plural of opercular. • OPERCULAR n. the opercular bone. |
| OPERCULATE | • operculate adj. Having an operculum. • operculate n. Any gastropod mollusc that has an operculum. • OPERCULATE adj. relating to the operculum, also OPERCULATED. |
| OPERCULUMS | • OPERCULUM n. (Latin) an anatomical part that serves as a lid or cover, also OPERCELE, OPERCULE. |
| OPERETTIST | • operettist n. The composer of an operetta. • OPERETTIST n. a composer of operettas. |