crawdad vs crawfish

crawdad and crawfish both are nouns.

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

As nouns, crawdad and crawfish are synonyms defined as:

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

Other synonyms of crawdad include crawdaddy, crayfish.

As nouns, crawdad and crawfish are synonyms defined as:

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

Other synonyms of crawdad include crayfish, ecrevisse.

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

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