proboscis vs olfactory organ

proboscis and olfactory organ both are nouns.

Word	Noun	Adjective	Verb	Adverb
proboscis	Yes	No	No	No
olfactory organ	Yes	No	No	No

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

proboscis: the human nose (especially when it is large)
olfactory organ: the organ of smell and entrance to the respiratory tract; the prominent part of the face of man or other mammals

Other hypernyms of proboscis include nose.

proboscis (noun)	olfactory organ (noun)
a long flexible snout as of an elephant	the organ of smell and entrance to the respiratory tract; the prominent part of the face of man or other mammals
the human nose (especially when it is large)