mimosa vs mixed drink

mimosa and mixed drink both are nouns.

Word	Noun	Adjective	Verb	Adverb
mimosa	Yes	No	No	No
mixed drink	Yes	No	No	No

As nouns, mixed drink is a hypernym of mimosa; that is, mixed drink is a word with a broader meaning than mimosa:

mimosa (noun)	mixed drink (noun)
a mixed drink containing champagne and orange juice	made of two or more ingredients
any of various tropical shrubs or trees of the genus Mimosa having usually yellow flowers and compound leaves
evergreen Australasian tree having white or silvery bark and young leaves and yellow flowers