Synonyms and related words :
Narcissus, aggressively self-confident, biggety, braggart, bumptious, chesty, cocky, conceited, egocentric, egoist, egotist, immodest, individualist, narcissist, narcist, no modest violet, obtrusive, overwise, peacockish, peacocky, perk, perky, pert, puffed up, self-conceited, self-opinionated, smart aleck, smart-alecky, smarty, smarty-pants, stuck-up, swelled-headed, swellhead, wise guy, wiseacre, wisecracker, wisehead, wisenheimer