common hyacinth vs hyacinth

common hyacinth and hyacinth both are nouns.

Word	Noun	Adjective	Verb	Adverb
common hyacinth	Yes	No	No	No
hyacinth	Yes	No	No	No

As nouns, hyacinth is a hypernym of common hyacinth; that is, hyacinth is a word with a broader meaning than common hyacinth:

common hyacinth: widely grown for its fragrance and its white, pink, blue, or purplish flowers
hyacinth: any of numerous bulbous perennial herbs

common hyacinth (noun)	hyacinth (noun)
widely grown for its fragrance and its white, pink, blue, or purplish flowers	any of numerous bulbous perennial herbs
	a red transparent variety of zircon used as a gemstone