9 letters
- squiffier25
- squintier20
- stiffened17
- stiffener16
- stridence14
- stupefied17
- suffering19
- superfine17
- surfeited14
- surfeiter13
- tenuities11
- teredines11
- terrified13
- terrifies12
- testified13
- testifier12
- tiffanies16
- tiredness11
- trendiest11
- turneries11
- unbriefed18
- undereats12
- underlets13
- underlies13
- undersets12
- underside13
- undersize21
- undesired13
- unfairest14
- unfertile15
- unfetters14
- unitizers20
- unmerited15
- unmitered15
- unrefined16
- unrevised16
- unshifted17
- unsterile12
- untidiest12
- unvisited16
- uveitides15
- versified17