high-up vs VIP

high-up and VIP both are nouns.

Word	Noun	Adjective	Verb	Adverb
high-up	Yes	No	No	No
VIP	Yes	No	No	No

As nouns, high-up and VIP are synonyms defined as:

high-up and VIP: an important or influential (and often overbearing) person

Other synonyms of high-up include dignitary, high muckamuck, panjandrum, very important person.

high-up (noun)	VIP (noun)
an important or influential (and often overbearing) person	an important or influential (and often overbearing) person