12 letters
- suppressions20
- suppurations21
- suspicioning23
- suspiciously23
- suspirations17
- sustentation15
- susurrations15
- syncopations22
- syndications20
- tenebrionids18
- tensiometers16
- tensiometric19
- terminations17
- tessellation15
- tetanization23
- theorization24
- thiocyanates20
- thioridazine25
- thiosulfates19
- tibiofibulae23
- tibiofibulas23
- titillations15
- tourbillions19
- traditionary16
- transactions17
- transduction19
- transections17
- transfection20
- transfixions24
- transfusions18
- transitional15
- translations15
- transmission17
- transudation16
- tredecillion19
- trepanations17
- trephination19
- trepidations17
- tribulations18
- trifoliolate17
- trifurcation20
- triplication20
- triturations14
- tumefactions23
- typification24
- uglification23
- ultraserious15
- ultraviolent20
- ultraviolets19
- umbilication24
- uncensorious19
- undecillions21
- unfastidious19
- ungraciously23
- unifications21
- unifoliolate19
- unillusioned19
- unionisation16
- unionization25
- unitizations24
- unpropitious21
- unquestioned26
- unsanctioned20
- unsuspicious22
- uproariously20
- urbanisation18
- urbanization27
- urediospores17
- usuriousness16
- utilizations24
- uxoriousness22
- vacationists20
- vacationland23
- vaccinations24
- vacillations22
- vacuolations22
- vainglorious21
- valedictions22
- valorization27
- vaporization29
- variegations19
- vasodilation19
- vaticination21
- vegetational20
- velarization27
- venesections21
- ventilations19
- verification23
- vesiculation22
- victoriously23
- vigintillion22
- vilification24
- vindications22
- vinification24
- violableness22
- violoncellos23
- vitalization27
- vituperation21
- vivification27
- vivisections24
- vocalization30
- vocationally24
- vociferation23
- workstations20
- zillionaires24
- zwitterionic28