moult vs throw off

moult is a noun but throw off is not a noun.

Word	Noun	Adjective	Verb	Adverb
moult	Yes	No	Yes	No
throw off	No	No	Yes	No

As verbs, throw off is a hypernym of moult; that is, throw off is a word with a broader meaning than moult:

Other hypernyms of moult include cast, cast off, drop, shake off, shed, throw, throw away.

moult (noun)	throw off (noun)
periodic shedding of the cuticle in arthropods or the outer skin in reptiles

moult (verb)	throw off (verb)
cast off hair, skin, horn, or feathers	to remove
	get rid of