obtuse vs derogation

obtuse is not a noun while derogation is a noun.

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

obtuse (noun)	derogation (noun)
	(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

obtuse (adjective)	derogation (adjective)
of an angle; between 90 and 180 degrees
(of a leaf shape) rounded at the apex
slow to learn or understand; lacking intellectual acuity
lacking in insight or discernment