13 letters
- interbreeding21
- intercalating21
- interchaining23
- interchangers22
- interchanging25
- intercropping26
- intercrossing20
- interestingly20
- intergrafting22
- interiorising17
- interiorizing26
- interknitting22
- interlayering20
- intermarrying22
- intermeddling23
- intermingling24
- internalising19
- internalizing28
- interplanting22
- interpleading22
- interpolating21
- interrelating18
- interrogating19
- interspersing20
- intertwisting20
- interworkings24
- introspecting23
- investigating23
- ironmongeries20
- jackhammering40
- jitterbugging33
- knowingnesses25
- languidnesses20
- languishingly26
- languishments24
- laryngectomee25
- laryngologies22
- laryngoscopes25
- lastingnesses18
- laughingstock29
- lengthinesses20
- letterboxings27
- letterspacing23
- liltingnesses19
- linebreedings22
- lingonberries21
- linguistician22
- lithographing26
- locksmithings29
- lockstitching29
- longanimities21
- mainstreaming23
- manufacturing28
- marginalizing32
- masculinising25
- masculinizing34
- masterminding24
- mastersingers19
- materialising20
- materializing29
- mathematizing33
- matriculating24
- meaninglessly24
- meetinghouses22
- megasporangia24
- memorialising23
- memorializing32
- meningococcal30
- meningococcic32
- meningococcus30
- merchandising26
- merchandizing35
- metalanguages23
- metalworkings27
- metastasizing28
- microbrewings28
- microfunguses27
- micrographing29
- micromanaging28
- mimeographing29
- minesweepings26
- miniaturizing30
- misaddressing21
- misallocating24
- misassembling26
- miscaptioning26
- miscataloging25
- mischanneling27
- misconceiving30
- misconducting28
- misconnecting27
- misconstruing24
- misdescribing26
- misdeveloping28
- misdiagnosing23
- misestimating22
- misevaluating25
- misperceiving29
- misprograming27
- mollycoddling29
- moneygrubbing31
- monophthongal28
- motherfucking32
- motorboatings22
- mountebanking29
- mousetrapping26
- mouthwatering25
- multibuilding27
- multitaskings25
- multitracking28
- mythologizing35
- narrowcasting23
- nasopharynges24
- nationalising19
- nationalizing28
- necessitating20
- nightclubbing32
- noncomplyings30
- nonconcurring26
- nonconducting27
- nonconforming28
- noncontingent23
- noncorrodings22
- nondecreasing22
- nondiapausing23
- nonengagement24
- nongonococcal28
- nongovernment26
- nongregarious20
- nonhappenings27
- nonincreasing22
- nonirritating18
- nonlinguistic23
- nonmeaningful27
- nonperforming27
- nonpracticing27
- nonreflecting25
- nothingnesses20
- ongoingnesses20
- orchestrating21
- orientalizing27
- orienteerings17
- oropharyngeal24
- outbargaining23
- outdelivering23
- outdistancing22
- outgeneraling21
- outglittering20
- outintriguing21
- outorganizing29
- outperforming26
- outpopulating25
- outrebounding23
- outstandingly22
- outstretching22
- overachieving29
- overanalyzing33
- overarranging23
- overasserting20
- overbalancing28
- overbearingly26
- overbleaching29
- overborrowing26
- overbreathing25
- overburdening26
- overconsuming28
- overdemanding26
- overdesigning24
- overdirecting24
- overeducating25
- overengineers21
- overexpanding32
- overextending29
- overfocussing27
- overgoverning27
- overindulging26
- overinflating25
- overinforming27
- overingenious22
- overingenuity24
- overlengthens24
- overmastering23
- overoperating23
- overpackaging32
- overpedalling26
- overproducing28
- overpromising26
- overpromoting26
- overreporting23
- overservicing27
- overshadowing26
- overslaughing26
- overspreading24
- overstraining21
- overstressing20
- oversupplying30
- overutilizing31
- overweeningly27
- overweighting27
- overwintering24