nematode worm vs nematode

nematode worm and nematode both are nouns.

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

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

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

Other synonyms of nematode worm include roundworm.

nematode worm (noun)	nematode (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