detachment vs separation

detachment and separation both are nouns.

Word	Noun	Adjective	Verb	Adverb
detachment	Yes	No	No	No
separation	Yes	No	No	No

As nouns, separation is a hypernym of detachment; that is, separation is a word with a broader meaning than detachment:

As nouns, detachment and separation are synonyms defined as:

Other synonyms of detachment include breakup.

detachment (noun)	separation (noun)
the act of releasing from an attachment or connection	the social act of separating or parting company
coming apart	the act of dividing or disconnecting
avoiding emotional involvement	(law) the cessation of cohabitation of man and wife (either by mutual agreement or under a court order)
a small unit of troops of special composition	sorting one thing from others
the state of being isolated or detached	the distance between things
	coming apart
	the termination of employment (by resignation or dismissal)
	the space where a division or parting occurs
	the state of lacking unity