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There are 19 fifteen-letter words containing OPER
| COOPERATIONISTS | • COOPERATIONIST n. one who believes in cooperation. |
| COOPERATIVENESS | • cooperativeness n. The state of being cooperative. • COOPERATIVE n. working together. |
| COOPERATIVITIES | • cooperativities n. Plural of cooperativity. • COOPERATIVITY n. the state of being cooperative. |
| INOPERABILITIES | • INOPERABILITY n. the quality of being inoperable. |
| INOPERATIVENESS | • inoperativeness n. The state or condition of being inoperative; nonfunction. • INOPERATIVE n. not operative. |
| ISOPERIMETRICAL | • isoperimetrical adj. Isoperimetric. • ISOPERIMETRICAL adj. having equal perimeters. |
| NINCOMPOOPERIES | • nincompooperies n. Plural of nincompoopery. • NINCOMPOOPERY n. the state of being a nincompoop. |
| NONCOOPERATIONS | • noncooperations n. Plural of noncooperation. • NONCOOPERATION n. failure or refusal to cooperate. |
| NONCOOPERATIVES | Sorry, definition not available. |
| OPERATIONALISMS | • operationalisms n. Plural of operationalism. • OPERATIONALISM n. the theory that defines scientific concepts by means of the operations used to prove or determine them, also OPERATIONISM. |
| OPERATIONALISTS | • operationalists n. Plural of operationalist. • OPERATIONALIST n. an exponent of operationalism. |
| OPERATIVENESSES | • operativenesses n. Plural of operativeness. • OPERATIVENESS n. OPERATIVE, having the power of operating or acting. |
| PHOTOPERIODISMS | • photoperiodisms n. Plural of photoperiodism. • PHOTOPERIODISM n. a plant or animal's response or capacity to respond to photoperiod. |
| POSTOPERATIVELY | • postoperatively adv. In a postoperative context; after surgery. • POSTOPERATIVE adv. following a surgical operation. |
| PROPERISPOMENON | • properispomenon adj. (Linguistics, of a word) In Greek grammar, having a circumflex accent on the penultimate syllable. • properispomenon n. (Linguistics) A word having such an accent. • PROPERISPOMENON n. a word with the circumflex accent on the penultimate syllable. |
| RETROPERITONEAL | • retroperitoneal adj. Located behind the peritoneum. • RETROPERITONEAL adj. situated behind the peritoneum. |
| THERMOPERIODISM | • thermoperiodism n. The property of being thermoperiodic. • THERMOPERIODISM n. the effect on an organism of rhythmic temperature variations. |
| TRIFLUOPERAZINE | • trifluoperazine n. An antipsychotic drug of the phenothiazine group. • TRIFLUOPERAZINE n. a tranquilizer chiefly used to treat psychotic conditions and esp. schizophrenia. |
| UNCOOPERATIVELY | • uncooperatively adv. In an uncooperative manner. • UNCOOPERATIVE adv. not cooperative. |
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 1Word.ws and WikWik.org.
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See this list for:
- English Wiktionary: 149 words
- Scrabble in French: 25 words
- Scrabble in Spanish: 6 words
- Scrabble in Italian: 44 words
- Scrabble in German: no word
- Scrabble in Romanian: 66 words
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