beach flea vs sandhopper

beach flea and sandhopper both are nouns.

Word	Noun	Adjective	Verb	Adverb
beach flea	Yes	No	No	No
sandhopper	Yes	No	No	No

As nouns, beach flea and sandhopper are synonyms defined as:

beach flea and sandhopper: small amphipod crustaceans that hop like fleas; common on ocean beaches

Other synonyms of beach flea include sand flea, sand hopper.

beach flea (noun)	sandhopper (noun)
small amphipod crustaceans that hop like fleas; common on ocean beaches	small amphipod crustaceans that hop like fleas; common on ocean beaches