shipworm vs teredo

shipworm and teredo both are nouns.

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

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

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

Other hyponyms of shipworm include Bankia setaceae, giant northwest shipworm.

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