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There are 19 words beginning with PHTH

PHTHALIC	• phthalic adj. (Chemistry) of, relating to, or derived from naphthalene or phthalic acid. • PHTHALIC adj. pertaining to, or designating, a dibasic acid obtained by the oxidation of naphthalene and allied substances.
PHTHALIN	• phthalin n. (Chemistry) A colourless crystalline substance obtained by reduction from phthalein, into which it is… • phthalin n. (Chemistry) Any of the series of which phthalin proper is the type. • PHTHALIN n. a colourless crystalline compound obtained by reducing a phthalein.
PHTHISES	• phthises n. Plural of phthisis. • PHTHISIS n. a disease of the lungs, also PHTHISIC.
PHTHISIC	• phthisic n. (Pathology) A wasting illness of the lungs, such as asthma or tuberculosis; consumption; phthisis. • phthisic n. (Pathology, formerly) Any wasting disease. • phthisic n. A person suffering from phthisis.
PHTHISIS	• phthisis n. (Archaic) An atrophy of the body or part of the body, especially pulmonary tuberculosis. • PHTHISIS n. a disease of the lungs, also PHTHISIC.
PHTHALATE	• phthalate n. (Organic chemistry) Any salt or ester of a phthalic acid. • PHTHALATE n. a salt of phthalic acid.
PHTHALEIN	• phthalein n. (Organic chemistry) any of a range of lactones formed by the reaction of phenols with phthalic anhydride. • PHTHALEIN n. any one of a very important class of dye-yielding materials formed by the union of phenols with phthalic anhydride.
PHTHALINS	• phthalins n. Plural of phthalin. • PHTHALIN n. a colourless crystalline compound obtained by reducing a phthalein.
PHTHISICS	• phthisics n. Plural of phthisic. • PHTHISIC n. a disease of the lungs, also PHTHISIS.
PHTHALATES	• phthalates n. Plural of phthalate. • PHTHALATE n. a salt of phthalic acid.
PHTHALEINS	• phthaleins n. Plural of phthalein. • PHTHALEIN n. any one of a very important class of dye-yielding materials formed by the union of phenols with phthalic anhydride.
PHTHISICAL	• phthisical adj. Phthisic. • PHTHISICAL adj. of or pertaining to phthisis.
PHTHISICKY	• phthisicky adj. Having phthisis, or some symptom of it, as difficulty in breathing. • PHTHISICKY adj. having phthisis, or some symptom of it, as difficulty in breathing.
PHTHIRIASES	• phthiriases n. Plural of phthiriasis. • PHTHIRIASIS n. infestation with lice.
PHTHIRIASIS	• phthiriasis n. (Medicine) An infestation with crab lice. • phthiriasis n. A pediculosis. • PHTHIRIASIS n. infestation with lice.
PHTHALOCYANIN	• phthalocyanin n. Alternative form of phthalocyanine. • PHTHALOCYANIN n. any of a group of green and blue organic colouring matters of great fastness and brilliance, also PHTHALOCYANINE.
PHTHALOCYANINE	• phthalocyanine n. (Organic chemistry) Any of a family of macrocyclic compounds having a structure similar to that of porphyrin;… • PHTHALOCYANINE n. any of a group of green and blue organic colouring matters of great fastness and brilliance, also PHTHALOCYANIN.
PHTHALOCYANINS	• phthalocyanins n. Plural of phthalocyanin. • PHTHALOCYANIN n. any of a group of green and blue organic colouring matters of great fastness and brilliance, also PHTHALOCYANINE.
PHTHALOCYANINES	• phthalocyanines n. Plural of phthalocyanine. • PHTHALOCYANINE n. any of a group of green and blue organic colouring matters of great fastness and brilliance, also PHTHALOCYANIN.

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.

See this list for:

English Wiktionary: 74 words
Scrabble in French: no word
Scrabble in Spanish: no word
Scrabble in Italian: no word
Scrabble in German: 2 words
Scrabble in Romanian: no word

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