antonymy vs semantic relation

antonymy and semantic relation both are nouns.

Word	Noun	Adjective	Verb	Adverb
antonymy	Yes	No	No	No
semantic relation	Yes	No	No	No

As nouns, semantic relation is a hypernym of antonymy; that is, semantic relation is a word with a broader meaning than antonymy:

antonymy: the semantic relation that holds between two words that can (in a given context) express opposite meanings
semantic relation: a relation between meanings

antonymy (noun)	semantic relation (noun)
the semantic relation that holds between two words that can (in a given context) express opposite meanings	a relation between meanings