gigantism vs hypertrophy

gigantism and hypertrophy both are nouns.

Word	Noun	Adjective	Verb	Adverb
gigantism	Yes	No	No	No
hypertrophy	Yes	No	Yes	No

As nouns, hypertrophy is a hypernym of gigantism; that is, hypertrophy is a word with a broader meaning than gigantism:

gigantism: excessive size; usually caused by excessive secretion of growth hormone from the pituitary gland
hypertrophy: abnormal enlargement of a body part or organ

gigantism (noun)	hypertrophy (noun)
excessive largeness of stature	abnormal enlargement of a body part or organ
excessive size; usually caused by excessive secretion of growth hormone from the pituitary gland

gigantism (verb)	hypertrophy (verb)
	undergo hypertrophy