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There are 5 twelve-letter words beginning with PROTH

PROTHALAMIONprothalamion n. (Literary) A song or poem in honour of a bride and bridegroom about to be married.
PROTHALAMION n. (Spenser) a song in honour of a marriage, also PROTHALAMIUM.
PROTHALAMIUMprothalamium n. Alternative form of prothalamion.
PROTHALAMIUM n. (Spenser) a song in honour of a marriage, also PROTHALAMION.
PROTHALLUSESprothalluses n. Plural of prothallus.
PROTHALLUS n. the free-living gametophyte of a fern or other vascular cryptogam, also PROTHALLIUM.
PROTHONOTARYprothonotary n. (Obsolete, historical) A chief legal clerk or notary in Roman Byzantium, and (hence) in Rome.
prothonotary n. (Roman Catholicism) One of the seven prelates, constituting a college in the Roman Curia, whose office…
prothonotary n. A registrar or chief clerk in various courts of law, especially (US) in a county court, (Australia)…
PROTHROMBINSprothrombins n. Plural of prothrombin.
PROTHROMBIN n. a protein-like substance present in blood plasma.

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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See this list for:

  • English Wiktionary: 11 words
  • Scrabble in French: 3 words
  • Scrabble in Spanish: no word
  • Scrabble in Italian: no word
  • Scrabble in German: no word
  • Scrabble in Romanian: no word


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