gigantism vs giantism

gigantism and giantism both are nouns.

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

As nouns, gigantism and giantism are synonyms defined as:

As nouns, gigantism and giantism are synonyms defined as:

gigantism and giantism: excessive size; usually caused by excessive secretion of growth hormone from the pituitary gland

Other synonyms of gigantism include overgrowth.

gigantism (noun)	giantism (noun)
excessive largeness of stature	excessive largeness of stature
excessive size; usually caused by excessive secretion of growth hormone from the pituitary gland	excessive size; usually caused by excessive secretion of growth hormone from the pituitary gland