List of 13-letter words beginning with

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There are 20 thirteen-letter words beginning with TRO

TROCHEAMETERS	• trocheameters n. Plural of trocheameter. • TROCHEAMETER n. a hodometer, also TROCHOMETER.
TROCHELMINTHS	• trochelminths n. Plural of trochelminth. • TROCHELMINTH n. any invertebrate of the former taxonomic group Trochelminthes, which included the rotifers and gastrotrichs.
TROCHOSPHERES	• trochospheres n. Plural of trochosphere. • TROCHOSPHERE n. a free-swimming pelagic form of many invertebrates, also TROCHOPHORE.
TROGLODYTICAL	• troglodytical adj. Alternative form of troglodytic. • TROGLODYTICAL adj. cave-dwelling, also TROGLODYTIC.
TROGLODYTISMS	• TROGLODYTISM n. the practice of living in caves.
TROLLEYBUSSES	• trolleybusses n. Plural of trolleybus. • trolley␣busses n. Plural of trolley bus. • TROLLEYBUS n. a bus running on an overhead electric wire.
TROPHALLACTIC	• trophallactic adj. Relating to trophallaxis. • TROPHALLACTIC adj. relating to trophallaxis, mutual exchange of nutriment in symbiosis.
TROPHOBLASTIC	• trophoblastic adj. Of, or relating to a trophoblast. • TROPHOBLASTIC adj. of or like a trophoblast.
TROPHOTROPISM	• trophotropism n. The movements of the organs in a growing plant, as towards nutrient substances, induced by the chemical… • TROPHOTROPISM n. direction of growth by nutritional factors.
TROPICALISING	• tropicalising v. Present participle of tropicalise. • TROPICALISE v. to make tropical, also TROPICALIZE.
TROPICALITIES	• TROPICALITY n. the state of being tropical.
TROPICALIZING	• tropicalizing v. Present participle of tropicalize. • TROPICALIZE v. to make tropical, also TROPICALISE.
TROPOCOLLAGEN	• tropocollagen n. (Biochemistry) A component of fibres of collagen in which three polypeptide chains are coiled around each other. • TROPOCOLLAGEN n. a subunit of collagen fibrils consisting of three polypeptide strands arranged in a helix.
TROPOSCATTERS	• TROPOSCATTER n. the propagation of radio waves by using irregularities in the troposphere to scatter the signals beamed up by means of high-powered UHF transmitters and parabolic antennas.
TROTHPLIGHTED	• trothplighted adj. (Dated) Having pledged one’s troth; engaged; promised. • trothplighted v. Simple past tense and past participle of trothplight. • TROTHPLIGHT v. to betroth.
TROUBLEMAKERS	• troublemakers n. Plural of troublemaker. • trouble-makers n. Plural of trouble-maker. • trouble␣makers n. Plural of trouble maker.
TROUBLEMAKING	• troublemaking adj. Causing trouble. • troublemaking n. Causing trouble; acting in a disruptive way. • TROUBLEMAKING n. the act of making trouble.
TROUBLESHOOTS	• troubleshoots v. Third-person singular simple present indicative form of troubleshoot. • TROUBLESHOOT v. to solve problems.
TROUBLESOMELY	• troublesomely adv. In a troublesome manner. • TROUBLESOME adv. causing trouble.
TROUBLOUSNESS	• troublousness n. The quality of being troublous. • TROUBLOUSNESS n. the state of being troublous.

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: 103 words
Scrabble in French: 58 words
Scrabble in Spanish: 47 words
Scrabble in Italian: 67 words
Scrabble in German: no word
Scrabble in Romanian: 69 words

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