spiny lobster vs crayfish

spiny lobster and crayfish both are nouns.

Word	Noun	Adjective	Verb	Adverb
spiny lobster	Yes	No	No	No
crayfish	Yes	No	No	No

As nouns, spiny lobster and crayfish are synonyms defined as:

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

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

As nouns, spiny lobster and crayfish are synonyms defined as:

spiny lobster and crayfish: warm-water lobsters without claws; those from Australia and South Africa usually marketed as frozen tails; caught also in Florida and California

Other synonyms of spiny lobster include langouste, rock lobster.

spiny lobster (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
warm-water lobsters without claws; those from Australia and South Africa usually marketed as frozen tails; caught also in Florida and California	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