segmented worm vs annelid worm

segmented worm and annelid worm both are nouns.

Word	Noun	Adjective	Verb	Adverb
segmented worm	Yes	No	No	No
annelid worm	Yes	No	No	No

As nouns, segmented worm and annelid worm are synonyms defined as:

segmented worm and annelid worm: worms with cylindrical bodies segmented both internally and externally

Other synonyms of segmented worm include annelid.

segmented worm (noun)	annelid worm (noun)
worms with cylindrical bodies segmented both internally and externally	worms with cylindrical bodies segmented both internally and externally