nematode vs nematode worm

nematode and nematode worm both are nouns.

Word	Noun	Adjective	Verb	Adverb
nematode	Yes	No	No	No
nematode worm	Yes	No	No	No

As nouns, nematode and nematode worm are synonyms defined as:

nematode and nematode worm: unsegmented worms with elongated rounded body pointed at both ends; mostly free-living but some are parasitic

Other synonyms of nematode include roundworm.

nematode (noun)	nematode worm (noun)
unsegmented worms with elongated rounded body pointed at both ends; mostly free-living but some are parasitic	unsegmented worms with elongated rounded body pointed at both ends; mostly free-living but some are parasitic