weight-lift vs weightlift

weight-lift is not a noun while weightlift is a noun.

Word	Noun	Adjective	Verb	Adverb
weight-lift	No	No	Yes	No
weightlift	Yes	No	Yes	No

As verbs, weight-lift and weightlift are synonyms defined as:

Other synonyms of weight-lift include press.

weight-lift (noun)	weightlift (noun)
	bodybuilding by exercise that involves lifting weights

weight-lift (verb)	weightlift (verb)
lift weights	lift weights