pug nose vs olfactory organ

pug nose and olfactory organ both are nouns.

Word	Noun	Adjective	Verb	Adverb
pug nose	Yes	No	No	No
olfactory organ	Yes	No	No	No

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

pug nose: a short nose; flattened and turned up at the end
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 pug nose include nose.

pug nose (noun)	olfactory organ (noun)
a short nose; flattened and turned up at the end	the organ of smell and entrance to the respiratory tract; the prominent part of the face of man or other mammals