14 letters
- instrumentally24
- intellectively27
- intellectually25
- intelligencers23
- intelligential21
- intelligentsia20
- intermetallics23
- interpellating23
- interpellation21
- interpellators20
- interpupillary26
- interstitially19
- intertextually27
- intracardially23
- intracranially23
- isentropically25
- isoalloxazines33
- isomorphically29
- jingoistically33
- jollifications32
- kapellmeisters26
- karyotypically32
- knuckleballers33
- lamellibranchs29
- legalistically25
- lignocellulose25
- linguistically26
- lithologically27
- longitudinally25
- malleabilities23
- manometrically28
- mathematically29
- megascopically32
- megasporophyll31
- mesdemoiselles23
- metallizations29
- metallographer26
- metallographic29
- metaphorically29
- metaphysically31
- metastatically24
- metathetically26
- metronomically28
- microfibrillar28
- millenarianism24
- millennialisms25
- millennialists22
- milliroentgens23
- misallocations23
- mischannelling29
- mollifications26
- monolithically28
- monomaniacally29
- monometallisms26
- monometallists23
- monophonically31
- monopropellant27
- moralistically25
- morganatically27
- motivationally26
- mulligatawnies26
- multilaterally24
- multilingually28
- multitrillions22
- mythologically31
- navigationally26
- neurogenically26
- neurologically26
- nitrocellulose22
- nonbelligerent24
- noncommittally29
- noncontrolling25
- noncrystalline24
- nonfulfillment30
- noninstallment23
- nonpolitically27
- novelistically27
- novemdecillion29
- nullifications25
- numismatically29
- occupationally29
- octodecillions24
- optimistically27
- organismically27
- organometallic25
- orthopedically27
- oscillographic29
- overcontrolled25
- overfulfilling31
- oxymoronically34
- pacifistically30
- palletizations29
- papillomavirus30
- parabiotically27
- paradisaically25
- paradisiacally25
- parallelepiped27
- parallelograms25
- parametrically27
- paratactically27
- pathologically29
- pelletizations29
- penicillamines27
- penicillinases24
- pestilentially23
- petrologically27
- phenologically30
- phenotypically32
- philatelically28
- philhellenisms28
- philhellenists25
- philologically30
- phlegmatically32
- phonologically30
- photogenically29
- photolytically29
- pleonastically26
- polyphonically33
- postcollegiate24
- postmillennial25
- preenrollments24
- preferentially25
- premaxillaries29
- premenstrually26
- premillenarian24
- presbyterially26
- presidentially23
- processionally25
- professionally25
- professorially24
- proportionally25
- prosthetically26
- prototypically29
- providentially27
- psychosexually36
- psychosocially31
- pyrometallurgy29
- pyrometrically29
- quadrillionths30
- quindecillions32
- quinquennially41
- quintillionths30
- radiolabelling24
- radiologically25
- rebelliousness21
- recrystallized31
- recrystallizes30
- redistillation18
- reinstallation18
- schismatically29
- scholastically27
- scientifically28
- scintillations21
- scintillometer23
- semiofficially30
- semiologically27
- seriocomically27
- shellfisheries23
- simplistically28
- skillessnesses21
- skillfulnesses26
- skullduggeries27
- sociologically27
- soullessnesses18
- spellbindingly30
- sporopollenins24
- steamrollering22
- stochastically26
- streptobacilli25
- suballocations24
- subcollections27
- submaxillaries30
- substantivally27
- successionally26
- supercolliders24
- supernaturally24
- supersonically26
- superthrillers22
- syllabications25
- synchronically30
- systematically26
- talismanically26
- tautologically25
- telemetrically25
- teleologically25
- telepathically27
- telephonically28
- telescopically28
- theocratically26
- theosophically28
- tortoiseshells18
- tranquillities27
- tranquillizers36
- tranquillizing39
- transitionally20
- tropocollagens25
- tropologically27
- ultrasonically24
- unacademically30
- uncollectibles28