酔っ払う

Verb

 * 1)  to become tipsy, intoxicated, or drunk

Usage notes
While and  are used interchangeably for becoming drunk,  is a more general term, also used for sickness (as in seasickness) or elation, while  is a more narrow term, referring only to drunkenness.

Further, refers to drunkenness (the condition), while  refers to a drunk (the person).