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 There are 14 fifteen-letter words containing O, P, 2R, S, 2T and Y| BIOSTRATIGRAPHY | • biostratigraphy n. (Biology, geology) The study of the stratigraphic distribution of fossils. • BIOSTRATIGRAPHY n. the determination of age, etc., of sedimentary strata from fossils which they contain.
 |  | CRYOPROTECTANTS | • cryoprotectants n. Plural of cryoprotectant. • CRYOPROTECTANT n. a cryoprotective substance.
 |  | CRYPTOGRAPHISTS | • cryptographists n. Plural of cryptographist. • CRYPTOGRAPHIST n. one who studies cryptographs.
 |  | DAGUERREOTYPIST | • daguerreotypist n. A person who makes daguerreotypes. • DAGUERREOTYPIST n. one who practises daguerreotyping, also DAGUERREOTYPER.
 |  | ERYTHROPOIETINS | • erythropoietins n. Plural of erythropoietin. • ERYTHROPOIETIN n. a glycoprotein hormone that stimulates the production of red blood cells by stem cells in bone marrow.
 |  | HYDROTHERAPISTS | • hydrotherapists n. Plural of hydrotherapist. • HYDROTHERAPIST n. a practitioner of hydrotherapy.
 |  | ORTHOPSYCHIATRY | • orthopsychiatry n. (Psychiatry) branch of psychiatry concerned with the prevention of mental illness, especially in the young. • ORTHOPSYCHIATRY n. preventive psychiatry for young people.
 |  | POLYARTHRITIDES | • polyarthritides n. Plural of polyarthritis. • POLYARTHRITIS n. arthritis affecting several joints.
 |  | POLYARTHRITISES | • POLYARTHRITIS n. arthritis affecting several joints. |  | PROCRASTINATORY | • procrastinatory adj. Of or pertaining to procrastination. • PROCRASTINATORY adj. tending to procrastinate, also PROCRASTINATIVE.
 |  | PYRETOTHERAPIES | • PYRETOTHERAPY n. medical treatment by causing fever. |  | PYROPHOTOMETERS | • PYROPHOTOMETER n. a type of pyrometer in which the temperature of an incandescent body is determined by photometric measurement of the light it emits. |  | RETROSPECTIVELY | • retrospectively adv. In a retrospective manner. • RETROSPECTIVE adv. looking back.
 |  | SURREPTITIOUSLY | • surreptitiously adv. In a surreptitious manner; stealthily, furtively, secretly. • SURREPTITIOUS adv. done by stealth.
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 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.
 
 See this list for:English Wiktionary: 74 wordsScrabble in French: 6 wordsScrabble in Spanish: 3 wordsScrabble in Italian: no wordScrabble in German: no wordScrabble in Romanian: no word
 
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