jessamine vs jasmine

jessamine and jasmine both are nouns.

Word	Noun	Adjective	Verb	Adverb
jessamine	Yes	No	No	No
jasmine	Yes	No	No	No

As nouns, jasmine is a hypernym of jessamine; that is, jasmine is a word with a broader meaning than jessamine:

jessamine: a climbing deciduous shrub with fragrant white or yellow or red flowers used in perfume and to flavor tea
jasmine: any of several shrubs and vines of the genus Jasminum chiefly native to Asia

jessamine (noun)	jasmine (noun)
a climbing deciduous shrub with fragrant white or yellow or red flowers used in perfume and to flavor tea	any of several shrubs and vines of the genus Jasminum chiefly native to Asia