moron vs retard

moron and retard both are nouns.

Word	Noun	Adjective	Verb	Adverb
moron	Yes	No	No	No
retard	Yes	No	Yes	No

As nouns, moron and retard are synonyms defined as:

Other synonyms of moron include changeling, cretin, half-wit, idiot, imbecile.

moron (noun)	retard (noun)
a person of subnormal intelligence	a person of subnormal intelligence

moron (verb)	retard (verb)
	lose velocity; move more slowly
	cause to move more slowly or operate at a slower rate
	slow the growth or development of
	be delayed