pop up again
- resurfaceAppear again after absence
- reappearBecome visible again
- emergeCome out into view
- returnGo back again
- recurHappen more than once
spring up · crop up · come back · bubble up · reemergence · revival · haunt · flashback · memory · ghost · whack-a-mole · persistent · stubborn · nagging · reminder · déjà vu · echo · repeat
sudden emergence vs. gradual fading
pop up againfade away
Diminish gradually to nothing
peter out · wither away · taper off · dwindle · melt away
recurrence vs. cessation
pop up againdie out
Cease to exist entirely
peter out · fizzle out · run its course · come to an end · discontinue