Sterner rhymes with:
turner, berner, burner, derner, earner, ferner, furner, gerner, herner, kerner, kirner, learner, lerner, merner, schwerner, silberner, thurner, thurnher, turner, verner, vernor, werner
Sterner sounds like:
southerner, starmer, starner, stermer, stoermer, stormer, streamer, strohmaier, strohmeier, strohmeyer, stromer, sturmer