shipworm vs teredinid

shipworm and teredinid both are nouns.

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

As nouns, shipworm and teredinid are synonyms defined as:

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

shipworm (noun)	teredinid (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