giantism vs gigantism

giantism and gigantism both are nouns.

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

As nouns, giantism and gigantism are synonyms defined as:

As nouns, giantism and gigantism are synonyms defined as:

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

Other synonyms of giantism include overgrowth.

giantism (noun)	gigantism (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