pinworm vs nematode

pinworm and nematode both are nouns.

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

As nouns, nematode is a hypernym of pinworm; that is, nematode is a word with a broader meaning than pinworm:

pinworm: small threadlike worm infesting human intestines and rectum especially in children
nematode: unsegmented worms with elongated rounded body pointed at both ends; mostly free-living but some are parasitic

Other hypernyms of pinworm include nematode worm, roundworm.

pinworm (noun)	nematode (noun)
small threadlike worm infesting human intestines and rectum especially in children	unsegmented worms with elongated rounded body pointed at both ends; mostly free-living but some are parasitic