disconnect vs detach

disconnect is a noun but detach is not a noun.

Word	Noun	Adjective	Verb	Adverb
disconnect	Yes	No	Yes	No
detach	No	No	Yes	No

As verbs, detach is a hyponym of disconnect; that is, detach is a word with a more specific, narrower meaning than disconnect:

Other hyponyms of disconnect include decouple, uncouple.

disconnect (noun)	detach (noun)
an unbridgeable disparity (as from a failure of understanding)

disconnect (verb)	detach (verb)
make disconnected, disjoin or unfasten	come to be detached
pull the plug of (electrical appliances) and render inoperable	cause to become detached or separated; take off
	separate (a small unit) from a larger, especially for a special assignment