- Unrobing Noun Pres. Participle
- Unroll Verb Noun
- Unrolling Noun Pres. Participle
- Unroofing Noun Pres. Participle
- Unrounding Noun
- Unruliness Noun
- Unsaddling Noun Pres. Participle
- Unsafety Noun
- Unsaid Past Participle Noun
- Unsalability Noun
- Unsanction Verb Noun Past Participle
- Unsaponifiable Adj Noun
- Unsatisfiability Noun Adj
- Unsaturate Noun Verb
- Unsaturation Noun Adj
- Unsaved Adj Noun
- Unsavoriness Noun
- Unsavouriness Noun
- Unscrambler Noun Adj
- Unscrambling Noun Pres. Participle
- Unscrewing Noun Pres. Participle
- Unscripted Adj Noun Past Participle
- Unscrupulousness Noun
- Unsealer Noun Adj
- Unsealing Noun Pres. Participle
- Unseaming Adj Noun
- Unseasonableness Noun
- Unseating Noun Pres. Participle
- Unseaworthiness Noun
- Unseemliness Noun
- Unselfishness Noun
- Unseparability Noun
- Unserviccability Noun
- Unserviceability Noun
- Unserviceable Adj Noun
- Unsettling Adj Noun
- Unsexing Noun
- Unshackling Noun Pres. Participle
- Unsharpness Noun
- Unsheathing Noun Pres. Participle
- Unshelling Noun Pres. Participle
- Unshift Verb Noun
- Unshifting Pres. Participle Noun
- Unshipping Noun Pres. Participle
- Unshorting Noun Pres. Participle
- Unsightliness Noun
- Unskilled Adj Noun
- Unskillfulness Noun
- Unsnapping Noun Pres. Participle
- Unsnarling Adj Noun
- Unsociability Noun
- Unsoldering Noun Pres. Participle
- Unsolvability Noun
- Unsophistication Noun
- Unsounder Noun
- Unsoundness Noun
- Unsparingness Noun
- Unspeakable Adj Noun
- Unsquashing Noun Pres. Participle
- Unstability Noun