hyperadrenocorticism vs Cushing's syndrome

hyperadrenocorticism and Cushing's syndrome both are nouns.

Word	Noun	Adjective	Verb	Adverb
hyperadrenocorticism	Yes	No	No	No
Cushing's syndrome	Yes	No	No	No

As nouns, hyperadrenocorticism and Cushing's syndrome are synonyms defined as:

hyperadrenocorticism and Cushing's syndrome: a glandular disorder caused by excessive cortisol

hyperadrenocorticism (noun)	Cushing's syndrome (noun)
a glandular disorder caused by excessive cortisol	a glandular disorder caused by excessive cortisol