crayfish vs Astacidae

crayfish and Astacidae both are nouns.

Word	Noun	Adjective	Verb	Adverb
crayfish	Yes	No	No	No
Astacidae	Yes	No	No	No

crayfish (noun)	Astacidae (noun)
large edible marine crustacean having a spiny carapace but lacking the large pincers of true lobsters	crayfish
small freshwater decapod crustacean that resembles a lobster
tiny lobster-like crustaceans usually boiled briefly
warm-water lobsters without claws; those from Australia and South Africa usually marketed as frozen tails; caught also in Florida and California