swank vs show off

swank is a noun but show off is not a noun.

Word	Noun	Adjective	Verb	Adverb
swank	Yes	Yes	Yes	No
show off	No	No	Yes	No

As verbs, swank and show off are synonyms defined as:

swank and show off: display proudly; act ostentatiously or pretentiously

Other synonyms of swank include flash, flaunt, ostentate.

swank (noun)	show off (noun)
elegance by virtue of being fashionable

swank (adjective)	show off (adjective)
imposingly fashionable and elegant

swank (verb)	show off (verb)
display proudly; act ostentatiously or pretentiously	display proudly; act ostentatiously or pretentiously