10 letters
- protostars13
- protostele14
- protostome16
- prototroph18
- prototypes18
- protreptic19
- pyrometers18
- racehorses15
- ratemeters13
- reattempts16
- recompense20
- recomposed20
- recomposes19
- recomputes20
- rectorates13
- rectorship18
- reemphases18
- remoteness14
- reoperates13
- represents14
- reproaches18
- researches15
- resketches19
- resmoothed16
- respecters16
- restitches15
- retouchers16
- retrenches16
- retrocedes14
- retrospect16
- rheometers15
- rhymesters17
- rocketeers17
- rockhopper25
- rootstocks17
- rotameters13
- sarcomeres16
- scatterers13
- screechers18
- scrootches18
- semaphores18
- semisecret16
- sermonette14
- servomotor17
- shampooers18
- sharecrops18
- sheepcotes18
- shelterers13
- shopkeeper22
- shorteners13
- shortstops15
- smatterers13
- smoothbore18
- somerseted14
- somewheres18
- sophomores18
- sophomoric21
- spaceports19
- spectators16
- spirochete18
- spirometer16
- sporocarps19
- sporophore18
- sporophyte20
- sputterers14
- staterooms13
- statoscope16
- stenotherm16
- stepmother18
- stereopses13
- stereotype15
- stertorous11
- stockrooms20
- stomachers18
- stonecrops17
- storehouse13
- storerooms13
- streetcars13
- stretchers15
- stretchier15
- stroppiest16
- stutterers11
- superettes14
- superports17
- superstore14
- supporters17
- tachometer18
- telephotos16
- telescopes17
- temporises16
- tetrameter13
- tetraspore13
- thermistor15
- thermosets15
- thermostat15
- threescore15
- threesomes15
- thromboses18
- throttlers13
- throwsters15
- tocopherol19
- tonometers14
- toothpaste15
- toothworts15
- topcrosses16
- topnotcher19
- tormenters14
- tormentors14
- treehopper18
- treponemes17
- trimesters13
- trisectors13
- troopships18
- trumpeters17
- typesetter15
- urochromes19
- usherettes13
- uttermosts14