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There are 3 words beginning with PROTOPLAN

PROTOPLANETprotoplanet n. An astronomical object, approximately the size of the Moon, formed from the mutual gravitational attraction…
PROTOPLANET n. a planet in its initial state of formation.
PROTOPLANETSprotoplanets n. Plural of protoplanet.
PROTOPLANET n. a planet in its initial state of formation.
PROTOPLANETARYprotoplanetary adj. (Astronomy, planets) Of or pertaining to a protoplanet.
protoplanetary adj. Relating to a stage in the life of a red giant star or its protoplanetary nebula during the star’s final…
proto-planetary adj. Alternative form of protoplanetary.

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: 12 words
  • Scrabble in French: 4 words
  • Scrabble in Spanish: 2 words
  • Scrabble in Italian: no word
  • Scrabble in German: no word
  • Scrabble in Romanian: no word


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