contradiction vs negation

contradiction and negation both are nouns.

Word	Noun	Adjective	Verb	Adverb
contradiction	Yes	No	No	No
negation	Yes	No	No	No

As nouns, negation is a hypernym of contradiction; that is, negation is a word with a broader meaning than contradiction:

contradiction (noun)	negation (noun)
the speech act of contradicting someone	the speech act of negating
(logic) a statement that is necessarily false	a negative statement; a statement that is a refusal or denial of some other statement
opposition between two conflicting forces or ideas	(logic) a proposition that is true if and only if another proposition is false