menu vs cascading menu

menu and cascading menu both are nouns.

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

As nouns, cascading menu is a hyponym of menu; that is, cascading menu is a word with a more specific, narrower meaning than menu:

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

Other hyponyms of menu include drop-down menu, hierarchical menu, submenu.

menu (noun)	cascading menu (noun)
an agenda of things to do	a secondary menu that appears while you are holding the cursor over an item on the primary menu
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