neb vs proboscis

neb and proboscis both are nouns.

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

As nouns, proboscis is a hyponym of neb; that is, proboscis is a word with a more specific, narrower meaning than neb:

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

Other hyponyms of neb include trunk.

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