Syringa villosa vs lilac

Syringa villosa and lilac both are nouns.

Word	Noun	Adjective	Verb	Adverb
Syringa villosa	Yes	No	No	No
lilac	Yes	Yes	No	No

As nouns, lilac is a hypernym of Syringa villosa; that is, lilac is a word with a broader meaning than Syringa villosa:

Syringa villosa: lilac of northern China having ovate leaves and profuse early summer rose-lilac flowers
lilac: any of various plants of the genus Syringa having large panicles of usually fragrant flowers

Syringa villosa (noun)	lilac (noun)
lilac of northern China having ovate leaves and profuse early summer rose-lilac flowers	any of various plants of the genus Syringa having large panicles of usually fragrant flowers

Syringa villosa (adjective)	lilac (adjective)
	of a pale purple color