WordNet sense 1 (a series of waves in the hair made by applying heat and chemicals):

perm, permanent wave

WordNet sense 2 (continuing forever or indefinitely):

everlasting, perpetual

WordNet sense 3 (unceasing):

abiding, enduring

WordNet sense 4 (continuing or enduring without marked change in status or condition or place):

lasting

WordNet sense 5 (not created for a particular occasion):

standing