VIP vs high muckamuck

VIP and high muckamuck both are nouns.

Word	Noun	Adjective	Verb	Adverb
VIP	Yes	No	No	No
high muckamuck	Yes	No	No	No

As nouns, VIP and high muckamuck are synonyms defined as:

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

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

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