Sharpens rhymes with:
aspen's, aspens, cheapens, coppens, deepens, happens, lippens, opens, oppens, pippen's, reopens, saipan's, tippens, weapon's, weapons, weapons', yaupons
Sharpens sounds like:
sarbanes, scorpions, scraping, scrapings, scrapping, scrivens, scrubbing, serbian's, serbians, serving, servings, sharpening, sharpnack, sharpness, surfing, surveying, surviving