hyperthyroidism vs adenosis

hyperthyroidism and adenosis both are nouns.

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

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

hyperthyroidism: an overactive thyroid gland; pathologically excessive production of thyroid hormones or the condition resulting from excessive production of thyroid hormones
adenosis: a disorder of the glands of the body

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

hyperthyroidism (noun)	adenosis (noun)
an overactive thyroid gland; pathologically excessive production of thyroid hormones or the condition resulting from excessive production of thyroid hormones	a disorder of the glands of the body