13 letters
- earnestnesses15
- earthlinesses17
- ectoparasites19
- ectoparasitic22
- emarginations20
- embarrassable23
- embarrassedly23
- embarrassment23
- endoparasites18
- endoparasitic21
- equalitarians25
- exemplariness28
- exemplarities27
- exhilarations24
- expeditionary27
- extemporarily29
- extracellular27
- extraliterary23
- extraordinary24
- extravascular29
- familiarising23
- familiarities20
- familiarizing32
- farcicalities23
- farkleberries24
- fearfulnesses22
- fibrosarcomas25
- fibrovascular28
- flowchartings28
- fluorocarbons25
- flutterboards22
- foolhardiness21
- formularizers30
- formularizing33
- forwardnesses21
- fragmentarily25
- freeheartedly22
- frowardnesses21
- functionaries22
- futilitarians19
- garnetiferous20
- garrulousness19
- genitourinary20
- geostationary18
- glaringnesses20
- grandparental22
- granularities18
- grossularites17
- guardednesses19
- guardianships23
- haggardnesses21
- halfheartedly25
- haphazardness31
- haphazardries30
- harbormasters21
- hardheartedly22
- hardstandings21
- harlequinades28
- harmfulnesses24
- harmonization29
- harquebusiers29
- haruspication23
- hazardousness27
- headquartered27
- heartbreakers22
- heartbreaking25
- heartburnings23
- heartlessness17
- heartsickness23
- hereditarians17
- heterokaryons22
- hexobarbitals29
- hierarchizing32
- hilariousness18
- housewarmings25
- humanitarians21
- hyperarousals22
- hyperparasite23
- hyperpolarize33
- hypopharynges30
- hypopharynxes35
- hypopituitary26
- illocutionary22
- imaginariness20
- inarticulates19
- incarcerating23
- incarceration21
- incardination20
- incarnadining23
- incendiarisms22
- inegalitarian18
- integumentary23
- intercellular21
- intercompared24
- intercompares23
- intergranular19
- interlinearly19
- intermarginal21
- intermarriage19
- intermarrying22
- interparticle21
- intracellular21
- intramuscular23
- intraocularly22
- intravascular23
- invariability24
- involuntarily24
- isocarboxazid36
- kindergartens22
- kindergartner22
- kindheartedly25
- laggardnesses20
- laparoscopies23
- laparoscopist23
- laryngectomee25
- laryngologies22
- laryngoscopes25
- learnednesses17
- lethargically25
- librarianship23
- linearization25
- lymphosarcoma30
- majoritarians26
- malariologies20
- malariologist20
- marchionesses22
- marginalities20
- marginalizing32
- mariculturist22
- marketability26
- marksmanships29
- marlinespikes25
- martyrization28
- martyrologies21
- martyrologist21
- marvelousness23
- matriarchates21
- megakaryocyte29
- mercenariness21
- metacercariae22
- metacercarial23
- microfilariae23
- microfilarial24
- microparticle26
- microvascular28
- misarticulate21
- momentariness21
- monarchically29
- monomolecular26
- multibarreled23
- multicellular25
- multiparticle25
- multipolarity24
- multivariable26
- muscularities22
- myocarditises22
- narratologies17
- narratologist17
- narrowcasting23
- nasopharynges24
- nasopharynxes29
- nearsightedly22
- necessitarian18
- neuromuscular24
- niggardliness21
- nightmarishly26
- nitroparaffin24
- nonagenarians19
- nonappearance25
- nonarchitects23
- noncarcinogen25
- noncharacters23
- noncomparable28
- nonelementary22
- nongregarious20
- nonhereditary20
- nonlibrarians20
- nonmonetarist19
- nonnarratives20
- nonparametric24
- nonstationary18
- nonvegetarian22
- northeastward20
- northwestward23
- notarizations24
- octogenarians20
- oleomargarine20
- openheartedly23
- oracularities18
- oropharyngeal24
- osteosarcomas19
- outbargaining23
- outwardnesses19
- ovariectomies23
- overarranging23
- overbearingly26
- overharvested24
- ovoviviparous29
- parabolically27
- paradoxically31