adenopathy vs glandular disease

adenopathy and glandular disease both are nouns.

Word	Noun	Adjective	Verb	Adverb
adenopathy	Yes	No	No	No
glandular disease	Yes	No	No	No

As nouns, glandular disease is a hypernym of adenopathy; that is, glandular disease is a word with a broader meaning than adenopathy:

adenopathy: a glandular disease or enlargement of glandular tissue (especially of the lymph glands)
glandular disease: a disorder of the glands of the body

Other hypernyms of adenopathy include adenosis, gland disease, glandular disorder.

adenopathy (noun)	glandular disease (noun)
a glandular disease or enlargement of glandular tissue (especially of the lymph glands)	a disorder of the glands of the body