handwash vs hand-wash

handwash and hand-wash both are verbs.

Word	Noun	Adjective	Verb	Adverb
handwash	No	No	Yes	No
hand-wash	No	No	Yes	No

As verbs, handwash and hand-wash are synonyms defined as:

handwash and hand-wash: wash or launder by hand instead of with a machine

handwash (verb)	hand-wash (verb)
wash or launder by hand instead of with a machine	wash or launder by hand instead of with a machine