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There are 5 twelve-letter words containing OPERATION

COOPERATIONScooperations n. Plural of cooperation.
coöperations n. Plural of coöperation.
COOPERATION n. the action of cooperating.
DISOPERATIONDISOPERATION n. a mutually harmful relationship between two organisms in a community.
OPERATIONISMoperationism 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.
OPERATIONISToperationist n. A proponent of operationism.
OPERATIONIST n. an adherent of operationism.
REOPERATIONSreoperations n. Plural of reoperation.
REOPERATION n. operation again.

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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See this list for:

  • English Wiktionary: 11 words
  • Scrabble in French: 2 words
  • Scrabble in Spanish: no word
  • Scrabble in Italian: no word
  • Scrabble in German: no word
  • Scrabble in Romanian: 3 words


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