hierarchical menu vs menu

hierarchical menu and menu both are nouns.

Word	Noun	Adjective	Verb	Adverb
hierarchical menu	Yes	No	No	No
menu	Yes	No	No	No

As nouns, menu is a hypernym of hierarchical menu; that is, menu is a word with a broader meaning than hierarchical menu:

hierarchical menu: a secondary menu that appears while you are holding the cursor over an item on the primary menu
menu: (computer science) a list of options available to a computer user

Other hypernyms of hierarchical menu include computer menu.

hierarchical menu (noun)	menu (noun)
a secondary menu that appears while you are holding the cursor over an item on the primary menu	an agenda of things to do
	a list of dishes available at a restaurant
	(computer science) a list of options available to a computer user
	the dishes making up a meal