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List of 11-letter words beginning with

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There are 15 eleven-letter words beginning with OPE

OPEIDOSCOPEopeidoscope n. An instrument, consisting of a tube with one end open and the other end covered with a thin flexible…
OPEIDOSCOPE n. an instrument for illustrating sound by means of light.
OPENABILITYopenability n. The quality of being openable.
OPENABILITY n. the ability to be opened.
OPENHEARTEDopenhearted adj. Alternative form of open-hearted.
open-hearted adj. Frank and candidly straightforward.
open-hearted adj. Generous and kind.
OPENMOUTHEDopenmouthed adj. Alternative form of open-mouthed.
open-mouthed adj. (Obsolete) Talkative; eager to speak.
open-mouthed adj. With the mouth open.
OPERABILITYoperability n. The extent to which a system or device is operable.
OPERABILITY n. the ability to be operated.
OPERAGOINGSOPERAGOING n. attending the opera.
OPERATIONALoperational adj. Of or relating to operations, especially military operations.
operational adj. Functioning and ready for use.
operational adj. Effective or operative.
OPERATISINGoperatising v. Present participle of operatise.
OPERATISE v. to turn a play etc. into an opera, also OPERATIZE.
OPERATIVELYoperatively adv. In an operative manner.
OPERATIVE adv. having the power of operating or acting.
OPERATIVITYoperativity n. Operativeness.
OPERATIVITY n. the state of being operative.
OPERATIZINGoperatizing v. Present participle of operatize.
OPERATIZE v. to turn a play etc. into an opera, also OPERATISE.
OPERCULATEDoperculated adj. Operculate.
OPERCULATED adj. relating to the operculum, also OPERCULATE.
OPERETTISTSoperettists n. Plural of operettist.
OPERETTIST n. a composer of operettas.
OPEROSENESSoperoseness n. (Archaic) The state of being operose; tedium.
OPEROSENESS n. the state of being operose.
OPEROSITIESOPEROSITY n. laboriousness.

Scrabble words — in black are valid world wide — in RED are not valid in North America — in GREEN are valid only in North America.
Definitions are short excerpt from the WikWik.org and 1Word.ws.

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