ceremonious vs pompous

ceremonious and pompous both are adjectives.

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

As adjectives, ceremonious and pompous are synonyms defined as:

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

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