Synonyms for Swanky:

adj.

plush (adjective)
ostentatious, fashionable, expensive, ritzy, flashy, stylish, fancy, swank, rich.

n.

fancy, ritzy, flashy, in style, upmarket, upscale, fashion-conscious, designer. showy (noun)
ostentatious, rich, expensive.
swanky (noun)
stylish, swank, fashionable.

Other synonyms:

ritzy. sumptuous
rich.
Other relevant words:
flashy, rich, ritzy, expensive, fancy, ostentatious.