overgrowth vs profusion

overgrowth and profusion both are nouns.

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

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

Other hypernyms of overgrowth include cornucopia, profuseness, richness.

overgrowth (noun)	profusion (noun)
a profusion of growth on or over something else	the property of being extremely abundant
excessive size; usually caused by excessive secretion of growth hormone from the pituitary gland