4 letters:
deep
5 letters:
small,
coral,
algal,
large,
lower,
water
6 letters:
sponge,
fossil,
larger,
shaped
7 letters:
ancient,
smaller,
massive
8 letters:
holocene,
devonian,
hogklint,
circular
9 letters:
microbial,
crinoidal
10 letters:
individual,
lacustrine
12 letters:
stromatolite,
radiocyathan,
archaeocyath
13 letters:
stromatolitic,
coralligenous
Commonly used words are shown in bold. Rare words are dimmed. Click on a word above to view its definition.
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