15 letters
- planimetrically30
- platitudinously26
- pluralistically28
- plutocratically30
- polyacrylamides31
- polycrystalline29
- polyelectrolyte28
- polymerisations25
- polymerizations34
- polymorphically36
- polynucleotides28
- polysaccharides30
- polyunsaturated25
- postapocalyptic33
- postoperatively28
- prefiguratively31
- prehistorically27
- premillennially29
- prepositionally26
- presynaptically31
- preternaturally24
- problematically32
- proportionately25
- proselytization31
- proteolytically28
- psychedelically34
- psychiatrically32
- psychoanalyzing41
- psychogenically35
- psychologically35
- pusillanimously29
- pyrotechnically33
- radiochemically31
- radiometrically26
- reduplicatively31
- remonstratively26
- retrogressively24
- retrospectively28
- revolutionarily25
- ritualistically24
- sanctimoniously27
- saprophytically32
- sculpturesquely37
- serendipitously24
- sidesplittingly26
- silviculturally30
- socialistically26
- socioculturally28
- solipsistically26
- sophisticatedly27
- splendiferously28
- stereologically25
- stereotaxically29
- stereotypically27
- subreptitiously26
- subterraneously24
- superabundantly29
- superstitiously23
- surreptitiously23
- sycophantically33
- syllogistically28
- sympathetically32
- symptomatically33
- synecdochically34
- synergistically27
- technologically31
- telegraphically30
- telekinetically28
- temperamentally29
- tenderheartedly23
- therapeutically28
- topographically32
- toxicologically35
- typographically34
- unadulteratedly24
- unanticipatedly28
- unceremoniously28
- uncomplainingly34
- unconditionally27
- understandingly26
- unexceptionably37
- unimaginatively30
- uninformatively31
- unintelligently26
- unintentionally24
- uninterruptedly26
- unprecedentedly29
- unpretentiously25
- unquestioningly34
- unrealistically25
- unsubstantially26
- unsymmetrically32
- untraditionally23
- ventriloquially35
- voyeuristically29
- xerographically36