proboscis vs neb

proboscis and neb both are nouns.

Word	Noun	Adjective	Verb	Adverb
proboscis	Yes	No	No	No
neb	Yes	No	No	No

As nouns, neb is a hypernym of proboscis; that is, neb is a word with a broader meaning than proboscis:

proboscis: a long flexible snout as of an elephant
neb: a long projecting or anterior elongation of an animal's head; especially the nose

Other hypernyms of proboscis include snout.

proboscis (noun)	neb (noun)
a long flexible snout as of an elephant	horny projecting mouth of a bird
the human nose (especially when it is large)	a long projecting or anterior elongation of an animal's head; especially the nose