derogation vs obtuse

derogation is a noun but obtuse is not a noun.

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

derogation (noun)	obtuse (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

derogation (adjective)	obtuse (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