- potheads14
- printheads17
- proofreads17
- pseudomonads22
- quads16
- rads5
- railheads13
- railroads11
- reads6
- redheads12
- reloads9
- repleads13
- rereads8
- respreads13
- rethreads12
- retreads9
- roads6
- roadsteads12
- salads8
- sapheads14
- scads9
- scareheads16
- scorepads16
- seminomads18
- shads8
- sheepsheads19
- shewbreads19
- shiploads16
- shitheads14
- shortbreads17
- showbreads19
- showerheads19
- skinheads17
- sleepyheads20
- softheads15
- soreheads12
- sowbreads16
- spearheads16
- spreads11
- springheads20
- squads17
- steads7
- steelheads14
- subheads15
- superroads15
- sweetbreads18
- swellheads18
- tads5
- tetrads8
- tetramethylleads26
- thickheads22
- thinclads17
- threads10
- thunderheads20
- tightwads17
- timberheads20
- toads6
- toolheads13
- towheads14
- trailheads14
- trainloads13
- tramroads13
- treads7
- triads7
- trichomonads22
- triclads13
- truckloads20
- turtleheads16
- undergrads16
- unleads11
- unloads11
- unthreads14
- untreads11
- uploads13
- wads8
- warheads14
- wellheads17
- whiteheads18
- wingspreads21
- woads9
- woodenheads19
- workloads18