teredinid vs shipworm

teredinid and shipworm both are nouns.

Word	Noun	Adjective	Verb	Adverb
teredinid	Yes	No	No	No
shipworm	Yes	No	No	No

As nouns, teredinid and shipworm are synonyms defined as:

teredinid and shipworm: wormlike marine bivalve that bores into wooden piers and ships by means of drill-like shells

teredinid (noun)	shipworm (noun)
wormlike marine bivalve that bores into wooden piers and ships by means of drill-like shells	wormlike marine bivalve that bores into wooden piers and ships by means of drill-like shells