crawdad vs ecrevisse

crawdad and ecrevisse both are nouns.

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

As nouns, ecrevisse is a hyponym of crawdad; that is, ecrevisse is a word with a more specific, narrower meaning than crawdad:

Other hyponyms of crawdad include Old World crayfish, American crayfish.

As nouns, crawdad and ecrevisse are synonyms defined as:

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

Other synonyms of crawdad include crawfish, crayfish.

crawdad (noun)	ecrevisse (noun)
small freshwater decapod crustacean that resembles a lobster	small crayfish of Europe and Asia and western North America
tiny lobster-like crustaceans usually boiled briefly	tiny lobster-like crustaceans usually boiled briefly