Newburn rhymes with:
arterburn, bradburn, camburn, clayburn, cockburn, cogburn, eastburn, fairburn, fishburn, freeburn, glassburn, heartburn, kinburn, marshburn, mashburn, milburn, osburn, pangburn, redburn, sunburn, washburn, washburne, winburn, woodburn
Newburn sounds like:
neoprene, nephron, new-bern, newbern, newborn, nonfarm, novopharm, nvryan