17 letters
- temporomandibular33
- tendentiousnesses22
- tenderheartedness23
- teratocarcinomata27
- tightfistednesses26
- transubstantiated24
- transubstantiates23
- trueheartednesses22
- ultracontemporary31
- unalterablenesses25
- uninhibitednesses27
- unintelligibility30
- unmitigatednesses26
- unpretentiousness25
- unrighteousnesses25
- warmheartednesses27