hypothyroidism vs adenosis

hypothyroidism and adenosis both are nouns.

Word	Noun	Adjective	Verb	Adverb
hypothyroidism	Yes	No	No	No
adenosis	Yes	No	No	No

As nouns, adenosis is a hypernym of hypothyroidism; that is, adenosis is a word with a broader meaning than hypothyroidism:

hypothyroidism: an underactive thyroid gland; a glandular disorder resulting from insufficient production of thyroid hormones
adenosis: a disorder of the glands of the body

Other hypernyms of hypothyroidism include gland disease, glandular disease, glandular disorder.

hypothyroidism (noun)	adenosis (noun)
an underactive thyroid gland; a glandular disorder resulting from insufficient production of thyroid hormones	a disorder of the glands of the body