12 letters
- orthogonally21
- orthographic24
- orthopaedics21
- orthopedists18
- orthopterans18
- orthopterist17
- orthopteroid18
- orthorhombic25
- orthotropous18
- overasserted17
- overexerting26
- overexertion24
- overreported20
- overtaxation24
- overthinking26
- overthrowing24
- overtightens21
- overtraining20
- overtreating19
- overtrimming25
- overtrumping26
- partialities16
- participants22
- participated22
- participates21
- participator21
- particularly23
- particulates20
- partisanship21
- partitioners16
- partitioning19
- partitionist16
- partnerships21
- parturitions17
- pertinacious20
- pertinencies20
- perturbation20
- portcullises21
- portentously20
- porterhouses18
- portlinesses17
- portmanteaus20
- portmanteaux27
- portraitists15
- portraitures16
- postabortion19
- praiseworthy22
- precertified22
- precertifies21
- preconcerted23
- predeparture20
- preportioned20
- prepuberties22
- propertyless21
- proportional20
- proportioned20
- protomartyrs20
- proudhearted20
- purplehearts22
- quarterbacks32
- quarterdecks30
- quarterfinal27
- quartersawed26
- quarterstaff28
- reapportions19
- rearticulate17
- reassertions13
- recertifying23
- rechartering20
- reconverting23
- refortifying23
- reinsertions14
- remortgaging22
- repartitions16
- scissortails16
- shirtdresses15
- shirtsleeved20
- shirtsleeves19
- shortchanged23
- shortchanger22
- shortchanges22
- shortcomings23
- shortcutting21
- shortsighted19
- spessartines16
- spessartites15
- sportfishing23
- sportfulness21
- sportinesses16
- sportiveness20
- sportscaster18
- sportswriter18
- stalwartness17
- startlements17
- stertorously16
- stonyhearted18
- stouthearted16
- supertankers21
- synarthroses17
- synarthrosis17
- thoroughwort22
- tortuosities13
- tortuousness15
- transportees16
- transporters16
- transporting19
- turtlenecked23
- unadvertised20
- underreports18
- undershirted18
- undertakings22
- undertenants17
- underthrusts18
- unfertilized28
- unfortunates19
- unimportance24
- unnewsworthy25
- unorthodoxly27
- unworthiness20
- verticalness21
- verticillate21
- vespertilian21
- virtualities18
- virtuosities17
- virtuousness19
- wholehearted21
- whortleberry23
- worthinesses18