12 letters
- occidentally24
- octapeptides22
- orchidaceous22
- orthopteroid18
- outsiderness15
- overidealize27
- overidentify23
- overstridden19
- overstriding20
- pallidnesses19
- paraboloidal21
- parasiticide19
- parathyroids20
- paratyphoids23
- pentamidines21
- pentapeptide23
- perfidiously23
- phosphatides23
- phosphatidic26
- phosphatidyl26
- phospholipid27
- photooxidize34
- placidnesses21
- plerocercoid23
- polypeptides25
- polypeptidic28
- polyploidies23
- polysulfides24
- postaccident23
- postmidnight24
- presidencies20
- presidential18
- pridefulness22
- proboscidean23
- proboscidian23
- proglottides19
- providential22
- pteridophyte23
- pteridosperm22
- pyridoxamine29
- radionuclide20
- rancidnesses18
- recidivistic23
- reconsidered18
- reembroiders19
- reidentified18
- reidentifies17
- reoxidations21
- resolidified18
- resolidifies17
- revalidating21
- revalidation19
- ridiculously22
- rodenticides18
- saccharoidal22
- semidarkness21
- semideifying24
- semidetached22
- semidiameter19
- semidominant21
- sideslipping23
- sidesteppers19
- sidestepping22
- sidetracking23
- sinusoidally19
- slickensides22
- solidaristic17
- solidarities14
- sordidnesses15
- spermatozoid28
- spheroidally22
- splendidness20
- staphylinids22
- stereopsides16
- stomatitides16
- stridulating18
- stridulation16
- stridulatory17
- stridulously19
- stupidnesses18
- subarachnoid23
- subdividable26
- subepidermal24
- subsidiaries17
- subsidiarily20
- subsidiarity19
- sulfonamides22
- tarradiddles16
- taxidermists23
- tenebrionids18
- thalidomides20
- thioridazine25
- tolbutamides21
- torridnesses14
- trepidations17
- triglyceride21
- turbidimeter20
- turbidimetry22
- turbidnesses18
- turgidnesses17
- tyrannicides20
- unbridgeable24
- unconsidered20
- underbidders20
- underbidding23
- unfastidious19
- unidentified20
- unsubsidized29
- untidinesses16
- vasculitides22
- veratridines18
- veridicality23
- videographer24
- voidableness22
- widowerhoods22