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