wild climbing hempweed vs climbing hemp-vine

wild climbing hempweed and climbing hemp-vine both are nouns.

Word	Noun	Adjective	Verb	Adverb
wild climbing hempweed	Yes	No	No	No
climbing hemp-vine	Yes	No	No	No

As nouns, wild climbing hempweed and climbing hemp-vine are synonyms defined as:

wild climbing hempweed and climbing hemp-vine: herb of tropical America having vanilla-scented flowers; climbs up trees

Other synonyms of wild climbing hempweed include climbing boneset, climbing hempweed, Mikania scandens.

wild climbing hempweed (noun)	climbing hemp-vine (noun)
herb of tropical America having vanilla-scented flowers; climbs up trees	herb of tropical America having vanilla-scented flowers; climbs up trees