List of 12-letter words beginning with

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There are 6 twelve-letter words beginning with OPE

OPEIDOSCOPES	• opeidoscopes n. Plural of opeidoscope. • OPEIDOSCOPE n. an instrument for illustrating sound by means of light.
OPENHANDEDLY	• openhandedly adv. Alternative form of open-handedly. • open-handedly adv. In an open-handed manner. • OPENHANDED adv. generous.
OPERATICALLY	• operatically adv. In an operatic manner. • OPERATIC adv. relating to opera.
OPERATIONISM	• operationism n. (Philosophy) The doctrine that the meaning of a term consists of the operation(s) performed in defining it. • OPERATIONISM n. the theory that defines scientific concepts by means of the operations used to prove or determine them, also OPERATIONALISM.
OPERATIONIST	• operationist n. A proponent of operationism. • OPERATIONIST n. an adherent of operationism.
OPERATORLESS	• operatorless adj. Without an operator (person who operates); fully automatic. • OPERATORLESS adj. without an operator.

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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English Wiktionary: 52 words
Scrabble in French: 2 words
Scrabble in Spanish: 1 word
Scrabble in Italian: 7 words
Scrabble in German: no word
Scrabble in Romanian: 17 words

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