grainstone

Not valid in Scrabble

It's a recognised English word, but it isn't in the official NASPA Scrabble word list.

Definition of grainstone

1 sense · 1 part of speech · etymology included

(countable, uncountable)A kind of calcareous rock that lacks mud and is grain-supported.

Definitions from Wiktionary, CC BY-SA.

From grain + stone.

2 plays · some not in Scrabble

200+ playable · top: RESONATING (11 pts)

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