climbing hempweed vs climbing hemp-vine

climbing hempweed and climbing hemp-vine both are nouns.

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

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

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

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

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