stand-down vs standdown

stand-down and standdown both are nouns.

Word	Noun	Adjective	Verb	Adverb
stand-down	Yes	No	No	No
standdown	Yes	No	No	No

As nouns, stand-down and standdown are synonyms defined as:

stand-down and standdown: (military) a temporary stop of offensive military action

As nouns, stand-down and standdown are synonyms defined as:

stand-down and standdown: a suspension and relaxation from an alert state or a state of readiness

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