Here's what rhymes with vowess.
aureus ous prowess leprous Words that almost rhyme with vowess
loudmouth foulness outface owlets doubtless allowance countess soundness loudness bounteous soundless stoutness brownness countless boundless cloudless roundness thousandths devoutness roundups groundless unsoundness viscountess accountants endowments groundnuts mountebanks profoundness announcements denouncements pronouncements