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There is only one four-letter word beginning with SIAL

SIALsial n. (Geology) The rocks rich in silicon and aluminum that form the upper layer of the earth’s crust, which…
SiAl n. (Geology) Alternative form of sial.
SIAL n. the upper layer of the continental crust, so called because it is rich in silica and aluminum oxide.

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: 2 words
  • Scrabble in French: 1 word
  • Scrabble in Spanish: no word
  • Scrabble in Italian: 1 word
  • Scrabble in German: 1 word
  • Scrabble in Romanian: 1 word


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