rosebud vs young lady

rosebud and young lady both are nouns.

Word	Noun	Adjective	Verb	Adverb
rosebud	Yes	No	No	No
young lady	Yes	No	No	No

As nouns, young lady is a hypernym of rosebud; that is, young lady is a word with a broader meaning than rosebud:

Other hypernyms of rosebud include fille, girl, miss, missy, young woman.

rosebud (noun)	young lady (noun)
(a literary reference to) a pretty young girl	a young female
the bud of a rose