13 letters
- inclinometers22
- incompetences27
- incompetently27
- indeterminacy24
- indeterminate19
- indeterminism22
- indeterminist19
- indiscretions19
- indomethacins24
- intermetallic22
- interpretable21
- intersocietal18
- iontophoretic22
- irretrievable21
- irretrievably23
- isometrically23
- lethargically25
- letterboxings27
- letterpresses17
- letterspacing23
- luncheonettes22
- magnetization29
- magnetographs26
- magnetometers22
- magnetometric25
- magnetopauses23
- magnetosphere24
- magnetostatic22
- marketability26
- meetinghouses22
- metabolically27
- metabolizable33
- metacercariae22
- metacercarial23
- metachromatic27
- metafictional24
- metalanguages23
- metalliferous22
- metallization28
- metallography27
- metallophones24
- metallurgical25
- metallurgists21
- metalworkings27
- metamerically26
- metamorphisms27
- metamorphosed25
- metamorphoses24
- metamorphosis24
- metaphosphate26
- metaphysician27
- metasomatisms22
- metastability22
- metastasizing28
- metencephalic29
- metencephalon27
- meteoriticist19
- meteorologies19
- meteorologist19
- methacrylates24
- methaqualones30
- methemoglobin28
- methodologies22
- methodologist22
- methotrexates25
- methoxychlors33
- methylmercury30
- methysergides23
- metronidazole28
- metropolitans21
- metrorrhagias20
- microcassette22
- micropipettes25
- misinterprets20
- monetizations27
- monometallism25
- monometallist22
- morphogenetic27
- morphometries24
- mousetrapping26
- multimetallic26
- mycetophagous29
- mythopoetical27
- nephelometers23
- nephelometric26
- nitromethanes20
- nonalphabetic27
- noncompetitor24
- nondepletable24
- nondetachable25
- nonmonetarist19
- nonparametric24
- nonpetroleums23
- nonretractile19
- nonreturnable21
- nonvegetarian22
- norethindrone19
- obstetrically23
- obstetricians20
- olfactometers23
- omnicompetent27
- onomatopoetic23
- organogenetic22
- outstretching22
- overanxieties25
- overenergetic23
- oversecretion21
- overstretched23
- overstretches22
- oversweetened22
- oversweetness21
- oxaloacetates24
- paleomagnetic26
- palletization28
- pamphleteered26
- paramagnetism25
- parameterized29
- parameterizes28
- parametrizing31
- parasynthetic24
- parenthetical23
- pelletization28
- penetrability23
- penetratingly23
- penetrometers20
- perpetrations20
- perpetuations21
- petrifactions23
- petrification23
- petrochemical28
- petrographers23
- petrographies23
- pettifoggings26
- pettishnesses19
- phenmetrazine32
- photodetector22
- phycomycetous32
- pietistically23
- planetesimals22
- planetologies21
- planetologist21
- plethysmogram29
- polarimetries20
- polyethylenes25
- polysyndetons24
- polyurethanes23
- potentiometer20
- preanesthetic22
- predetermined22
- predeterminer21
- predetermines21
- premarketings26
- preretirement20
- presettlement21
- presweetening23
- pretelevision22
- pretensioning21
- pretentiously21
- pretermission20
- pretermitting22
- preternatural19
- pretournament22
- pretreatments20
- prophetically28
- proprietaries19
- proprietorial20
- psychogenetic29
- psychokinetic31
- psychometrics29
- psychometries26
- psychrometers26
- psychrometric29
- pyrheliometer24
- pyrimethamine27
- redetermining21
- reflectometer23
- reflectometry25
- refractometer22
- refractometry24
- regretfulness21
- reinterpreted18
- repetitiously20
- repletenesses18
- resettlements18
- respirometers19
- respirometric22
- retentiveness19
- retentivities18
- reticulations19
- reticulocytes23
- retinopathies19
- retinoscopies20
- retirednesses15
- retransferred18
- retransformed21
- retranslating18
- retranslation16
- retransmitted18
- retrenchments23
- retributively24