sipunculid vs peanut worm

sipunculid and peanut worm both are nouns.

Word	Noun	Adjective	Verb	Adverb
sipunculid	Yes	No	No	No
peanut worm	Yes	No	No	No

As nouns, sipunculid and peanut worm are synonyms defined as:

sipunculid and peanut worm: small unsegmented marine worm that when disturbed retracts its anterior portion into the body giving the appearance of a peanut

sipunculid (noun)	peanut worm (noun)
small unsegmented marine worm that when disturbed retracts its anterior portion into the body giving the appearance of a peanut	small unsegmented marine worm that when disturbed retracts its anterior portion into the body giving the appearance of a peanut