crawdaddy vs crawfish

crawdaddy and crawfish both are nouns.

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

As nouns, crawdaddy and crawfish are synonyms defined as:

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

Other synonyms of crawdaddy include crawdad, crayfish.

crawdaddy (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
	small freshwater decapod crustacean that resembles a lobster
	tiny lobster-like crustaceans usually boiled briefly

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