parvenu vs pretentious

parvenu is a noun but pretentious is not a noun.

Word	Noun	Adjective	Verb	Adverb
parvenu	Yes	Yes	No	No
pretentious	No	Yes	No	No

parvenu (noun)	pretentious (noun)
a person who has suddenly risen to a higher economic status but has not gained social acceptance of others in that class

parvenu (adjective)	pretentious (adjective)
of or characteristic of a parvenu	making claim to or creating an appearance of (often undeserved) importance or distinction
characteristic of someone who has risen economically or socially but lacks the social skills appropriate for this new position	intended to attract notice and impress others
	(of a display) tawdry or vulgar