gonadotropin vs gonadotrophin

gonadotropin and gonadotrophin both are nouns.

Word	Noun	Adjective	Verb	Adverb
gonadotropin	Yes	No	No	No
gonadotrophin	Yes	No	No	No

As nouns, gonadotropin and gonadotrophin are synonyms defined as:

gonadotropin and gonadotrophin: hormone secreted by the anterior pituitary gland and placenta; stimulates the gonads and controls reproductive activity

Other synonyms of gonadotropin include gonadotrophic hormone, gonadotropic hormone.

gonadotropin (noun)	gonadotrophin (noun)
hormone secreted by the anterior pituitary gland and placenta; stimulates the gonads and controls reproductive activity	hormone secreted by the anterior pituitary gland and placenta; stimulates the gonads and controls reproductive activity