patrol vs detachment

patrol and detachment both are nouns.

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

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

patrol (noun)	detachment (noun)
the activity of going around or through an area at regular intervals for security purposes	the act of releasing from an attachment or connection
a detachment used for security or reconnaissance	coming apart
a group that goes through a region at regular intervals for the purpose of security	avoiding emotional involvement
	a small unit of troops of special composition
	the state of being isolated or detached

patrol (verb)	detachment (verb)
maintain the security of by carrying out a patrol