Hunter vs gaseous nebula

Hunter and gaseous nebula both are nouns.

Word	Noun	Adjective	Verb	Adverb
Hunter	Yes	No	No	No
gaseous nebula	Yes	No	No	No

As nouns, gaseous nebula is a hypernym of Hunter; that is, gaseous nebula is a word with a broader meaning than Hunter:

Hunter: a constellation on the equator to the east of Taurus; contains Betelgeuse and Rigel
gaseous nebula: a cluster of stars within an intricate cloud of gas and dust

Other hypernyms of Hunter include diffuse nebula.

Hunter (noun)	gaseous nebula (noun)
a constellation on the equator to the east of Taurus; contains Betelgeuse and Rigel	a cluster of stars within an intricate cloud of gas and dust