retard vs derogation

retard and derogation both are nouns.

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

retard (noun)	derogation (noun)
a person of subnormal intelligence	(law) the partial taking away of the effectiveness of a law; a partial repeal or abolition of a law
	a communication that belittles somebody or something

retard (verb)	derogation (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