Addison's syndrome vs hypoadrenalism

Addison's syndrome and hypoadrenalism both are nouns.

Word	Noun	Adjective	Verb	Adverb
Addison's syndrome	Yes	No	No	No
hypoadrenalism	Yes	No	No	No

As nouns, Addison's syndrome and hypoadrenalism are synonyms defined as:

Addison's syndrome and hypoadrenalism: a glandular disorder caused by failure of function of the cortex of the adrenal gland and marked by anemia and prostration with brownish skin

Other synonyms of Addison's syndrome include Addison's disease, hypoadrenocorticism.

Addison's syndrome (noun)	hypoadrenalism (noun)
a glandular disorder caused by failure of function of the cortex of the adrenal gland and marked by anemia and prostration with brownish skin	a glandular disorder caused by failure of function of the cortex of the adrenal gland and marked by anemia and prostration with brownish skin