13 letters
- quadripartite27
- quarterbacked34
- quarterfinals28
- quartermaster26
- quarterstaffs29
- quarterstaves27
- quasiparticle30
- reapportioned21
- rearticulated19
- rearticulates18
- reexportation24
- reimportation20
- repartitioned18
- reportorially20
- seaworthiness19
- shortchangers23
- shortchanging26
- softheartedly22
- sportfishings24
- sportscasters19
- sportscasting22
- sportsmanlike25
- sportsmanship25
- sportswriters19
- sportswriting22
- subdepartment25
- superterrific23
- superthriller21
- supervirtuosi22
- supervirtuoso22
- swarthinesses19
- synarthrodial20
- teleportation18
- tenderhearted18
- tetartohedral17
- thoroughworts23
- torticollises18
- tortoiseshell17
- transportable21
- trustworthily22
- ultraorthodox25
- unarticulated21
- unassertively22
- uncertainness20
- uncertainties19
- uncomfortable28
- uncomfortably30
- underreported20
- unearthliness19
- unforthcoming29
- unfortunately23
- unimportances25
- unorthodoxies25
- unsupportable26
- untrustworthy23
- verticalities21
- vertiginously24
- waterthrushes21
- worthlessness20