overgrowth vs hypertrophy

overgrowth and hypertrophy both are nouns.

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

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

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

overgrowth (noun)	hypertrophy (noun)
a profusion of growth on or over something else	abnormal enlargement of a body part or organ
excessive size; usually caused by excessive secretion of growth hormone from the pituitary gland

overgrowth (verb)	hypertrophy (verb)
	undergo hypertrophy