Primmer rhymes with:
brimmer, grimmer, rimmer, trimmer, brimmer, dimmer, excimer, glimmer, grimmer, kimmer, klimer, limmer, nimmer, rimmer, schwimmer, shimmer, simmer, skimmer, slimmer, swimmer, timmer, timur, trimmer, wimmer, zimmer
Primmer sounds like:
paramore, parmar, parmer, parramore, premier, premiere, primary, primer, pruner, prunier