enmity vs tension

enmity and tension both are nouns.

Word	Noun	Adjective	Verb	Adverb
enmity	Yes	No	No	No
tension	Yes	No	No	No

As nouns, tension is a hyponym of enmity; that is, tension is a word with a more specific, narrower meaning than enmity:

Other hyponyms of enmity include latent hostility, state of war, war, cold war, suspicion.

enmity (noun)	tension (noun)
the feeling of a hostile person	the action of stretching something tight
a state of deep-seated ill-will	(physics) a stress that produces an elongation of an elastic physical body
	feelings of hostility that are not manifest
	the physical condition of being stretched or strained
	a balance between and interplay of opposing elements or tendencies (especially in art or literature)
	(psychology) a state of mental or emotional strain or suspense