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There are 4 nine-letter words beginning with NAPHTH

NAPHTHENEnaphthene n. (Organic chemistry) Any cycloalkane (or alkyl derivative).
NAPHTHENE n. a peculiar hydrocarbon occurring as an ingredient of Caucasian petroleum.
NAPHTHOLSnaphthols n. Plural of naphthol.
NAPHTHOL n. any one of a series of hydroxyl derivatives of naphthalene, analogous to phenol, also NAPHTOL.
NAPHTHOUSNAPHTHOUS adj. containing naphtha.
NAPHTHYLSnaphthyls n. Plural of naphthyl.
NAPHTHYL n. a radical derived from naphthalene.

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: 5 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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