standdown vs abeyance

standdown and abeyance both are nouns.

Word	Noun	Adjective	Verb	Adverb
standdown	Yes	No	No	No
abeyance	Yes	No	No	No

As nouns, abeyance is a hypernym of standdown; that is, abeyance is a word with a broader meaning than standdown:

standdown: a suspension and relaxation from an alert state or a state of readiness
abeyance: temporary cessation or suspension

Other hypernyms of standdown include suspension.

standdown (noun)	abeyance (noun)
(military) a temporary stop of offensive military action	temporary cessation or suspension
a suspension and relaxation from an alert state or a state of readiness