borer vs woodborer

borer and woodborer both are nouns.

Word	Noun	Adjective	Verb	Adverb
borer	Yes	No	No	No
woodborer	Yes	No	No	No

As nouns, borer and woodborer are synonyms defined as:

borer and woodborer: any of various insects or larvae or mollusks that bore into wood

borer (noun)	woodborer (noun)
any of various insects or larvae or mollusks that bore into wood	any of various insects or larvae or mollusks that bore into wood
a drill for penetrating rock