What ias the difference between gonadal hormone and gonadotropin?

Gonadal hormones are those hormones that are actually released from the gonads (ex. estrogen, testosterone). Gonadotropins are hormones that CAUSE the release of gonadal hormones, gonadotropins are released from the anterior pituitary gland(tropin means "releasing" so gonadotropin is a gonad hormone releasing hormone) an example of this would be FSH-- follicle stimulating hormone.