pompous vs ceremonious

pompous and ceremonious both are adjectives.

Word	Noun	Adjective	Verb	Adverb
pompous	No	Yes	No	No
ceremonious	No	Yes	No	No

As adjectives, pompous and ceremonious are synonyms defined as:

pompous and ceremonious: characterized by pomp and ceremony and stately display

pompous (adjective)	ceremonious (adjective)
characterized by pomp and ceremony and stately display	characterized by pomp and ceremony and stately display
puffed up with vanity	rigidly formal or bound by convention