Answer: ampsup

AnswerCrossword Clue
AMPSUPIntensifies
AMPSUPIncreases a few notches
AMPSUPIntensifies, informally
AMPSUPExcites
AMPSUPIntensifies, in slang
AMPSUPEscalates
AMPSUPJuices
AMPSUPEnergizes
AMPSUPCharges