ACTH vs hormone

ACTH and hormone both are nouns.

Word	Noun	Adjective	Verb	Adverb
ACTH	Yes	No	No	No
hormone	Yes	No	No	No

As nouns, hormone is a hypernym of ACTH; that is, hormone is a word with a broader meaning than ACTH:

ACTH: a hormone produced by the anterior pituitary gland that stimulates the adrenal cortex
hormone: the secretion of an endocrine gland that is transmitted by the blood to the tissue on which it has a specific effect

Other hypernyms of ACTH include endocrine, internal secretion.

ACTH (noun)	hormone (noun)
a hormone produced by the anterior pituitary gland that stimulates the adrenal cortex	the secretion of an endocrine gland that is transmitted by the blood to the tissue on which it has a specific effect