panjandrum vs high muckamuck

panjandrum and high muckamuck both are nouns.

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

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

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

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

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