crawfish vs crayfish

crawfish and crayfish both are nouns.

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

As nouns, crawfish and crayfish are synonyms defined as:

crawfish and crayfish: large edible marine crustacean having a spiny carapace but lacking the large pincers of true lobsters

Other synonyms of crawfish include langouste, rock lobster, sea crawfish, spiny lobster.

As nouns, crawfish and crayfish are synonyms defined as:

crawfish and crayfish: small freshwater decapod crustacean that resembles a lobster

Other synonyms of crawfish include crawdad, crawdaddy.

As nouns, crawfish and crayfish are synonyms defined as:

crawfish and crayfish: tiny lobster-like crustaceans usually boiled briefly

Other synonyms of crawfish include crawdad, ecrevisse.

crawfish (noun)	crayfish (noun)
large edible marine crustacean having a spiny carapace but lacking the large pincers of true lobsters	large edible marine crustacean having a spiny carapace but lacking the large pincers of true lobsters
small freshwater decapod crustacean that resembles a lobster	small freshwater decapod crustacean that resembles a lobster
tiny lobster-like crustaceans usually boiled briefly	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

crawfish (verb)	crayfish (verb)
make a retreat from an earlier commitment or activity