14 letters
- antisubversive27
- antisyphilitic26
- antitechnology26
- antiterrorisms18
- antiterrorists15
- antithetically24
- antitubercular24
- antiuniversity23
- aperiodicities21
- aphoristically26
- apocalypticism32
- apolipoprotein25
- apologetically27
- apoplectically31
- aposematically27
- apostolicities21
- apostrophising25
- apostrophizing34
- apotropaically27
- appendectomies28
- appendicectomy33
- appendicitises25
- apportionments25
- appositenesses21
- appreciatively30
- apprehensively30
- apprenticeship29
- appropriations24
- approximations31
- aquaculturists30
- arabicizations30
- arboricultural24
- arboricultures23
- archaebacteria25
- archaeological26
- archaeologists22
- archbishoprics30
- archdeaconries24
- archiepiscopal29
- archimandrites24
- architectonics26
- argumentations22
- arithmetically26
- arithmeticians23
- armamentariums25
- aromatherapies22
- aromatherapist22
- aromatizations27
- arrondissement20
- arteriographic24
- articulateness20
- artificialness22
- ascertainments22
- assassinations16
- assaultiveness21
- assimilability24
- assistantships20
- associateships22
- associationism21
- associationist18
- assumabilities22
- asthenospheric25
- astrobiologies20
- astrobiologist20
- astrologically24
- astronomically25
- astrophysicist24
- asymmetrically29
- asymptotically29
- attitudinising20
- attitudinizing29
- attractiveness22
- audiocassettes19
- auspiciousness23
- authenticating24
- authentication22
- authenticators21
- authenticities21
- authoritarians18
- authorizations27
- autoantibodies20
- autobiographer25
- autobiographic28
- autocratically25
- autoeroticisms21
- autoimmunities23
- autoinfections23
- automaticities21
- automatization28
- automobilities22
- autopolyploids26
- autopolyploidy28
- autoradiograms21
- autoradiograph23
- autosuggesting23
- autosuggestion21
- autotetraploid20
- availabilities23
- avariciousness23
- avascularities23
- aversivenesses23
- avuncularities25
- axiomatisation25
- axiomatization34
- axisymmetrical33
- azidothymidine33
- backscattering30
- bactericidally28
- bacteriologies23
- bacteriologist23
- bacteriophages27
- bacteriostases20
- bacteriostasis20
- bacteriostatic23
- bacterizations30
- balkanizations33
- barbarizations30
- barometrically27
- basidiomycetes26
- bastardization28
- beatifications24
- beautification25
- beggarlinesses23
- belligerencies25
- beneficialness26
- beneficiations25
- benzimidazoles41
- benzodiazepine41
- bewilderedness24
- bibliographers28
- bibliographies28
- bibliomaniacal29
- bibliophilisms30
- bibulousnesses24
- biconditionals24
- biculturalisms27
- bidialectalism26
- bigheartedness23
- bildungsromane27
- bildungsromans27
- binocularities23
- biochemistries25
- bioconversions26
- biodegradation22
- biodiversities22
- bioelectricity26
- bioengineering24
- biogenetically27
- biogeochemical31
- biogeographers26
- biogeographies26
- biographically31
- bioluminescent27
- biomathematics28
- biometeorology25
- bioregionalism24
- bioregionalist21
- bioremediation22
- biostatistical21
- biosystematics25
- biosystematist22
- biotelemetries21
- bipartisanisms24
- bipartisanship26
- bipolarization31
- birefringences27
- bituminization32
- biuniquenesses30
- blackguardisms32
- blacksmithings33
- blaxploitation30
- blimpishnesses27
- blissfulnesses24
- bloodthirstily24
- boardinghouses24
- boisterousness19
- bolometrically28
- bougainvillaea27
- bougainvilleas27
- bouillabaisses23
- bourgeoisified24
- bourgeoisifies23
- bowdlerization32
- brachycephalic36
- brackishnesses27
- braillewriters22
- brainstormings24
- braunschweiger29
- breathtakingly29
- brinksmanships31
- bromocriptines27
- bronchiectases26
- bronchiectasis26
- bronchodilator25
- bronchoscopies29
- bronchoscopist29
- bronchospastic29
- brushabilities24
- brutalizations29
- buffaloberries28