monorchidism vs cryptorchism

monorchidism and cryptorchism both are nouns.

Word	Noun	Adjective	Verb	Adverb
monorchidism	Yes	No	No	No
cryptorchism	Yes	No	No	No

As nouns, cryptorchism is a hypernym of monorchidism; that is, cryptorchism is a word with a broader meaning than monorchidism:

monorchidism: failure of one testes to descend into the scrotum
cryptorchism: failure of one or both testes to move into the scrotum as the male fetus develops

Other hypernyms of monorchidism include cryptorchidism, cryptorchidy.

monorchidism (noun)	cryptorchism (noun)
failure of one testes to descend into the scrotum	failure of one or both testes to move into the scrotum as the male fetus develops