21 letter words
ANTIFERROMAGNETICALLY​32
20 letter words
CYTODIFFERENTIATIONS​32
MAGNETOFLUIDDYNAMICS​35
19 letter words (4 words)
COUNTERINFLATIONARY​27
CYTODIFFERENTIATION​31
INTERFEROMETRICALLY​29
POLYESTERIFICATIONS​29
18 letter words (7 words)
MYELOPROLIFERATIVE​31
POLYESTERIFICATION​28
QUANTIFICATIONALLY​35
SEMIPROFESSIONALLY​28
STEREOSPECIFICALLY​30
TRANSFORMATIONALLY​26
ULTRACENTRIFUGALLY​27
17 letter words (8 words)
CONFIGURATIONALLY​26
DIFFERENTIABILITY​29
FERRIMAGNETICALLY​28
HYPERINFLATIONARY​31
NONENFORCEABILITY​27
NONPROFESSIONALLY​25
STEREOSPECIFICITY​29
STRAIGHTFORWARDLY​31
16 letter words (17 words)
DEMYSTIFICATIONS​27
FERROELECTRICITY​26
FLABBERGASTINGLY​28
FLEXOGRAPHICALLY​37
FLIBBERTIGIBBETY​31
FLUOROSCOPICALLY​28
HYPERFUNCTIONING​30
IMMUNODEFICIENCY​31
INDEFATIGABILITY​26
INTERSTRATIFYING​23
MULTIFACTORIALLY​26
NONSIGNIFICANTLY​25
SYLLABIFICATIONS​26
UNAFFECTIONATELY​27
UNPROFESSIONALLY​24
UNSATISFACTORILY​24
UNSCIENTIFICALLY​26
15 letter words (59 words)
CONFIDENTIALITY​24
TRANSFERABILITY​23
INTERFRATERNITY​21
INFINITESIMALLY​23
NEUROFIBRILLARY​23
INSIGNIFICANTLY​24
OVERSIMPLIFYING​29
DISRESPECTFULLY​26
INFORMATIONALLY​23
DEMYSTIFICATION​26
SYLLABIFICATION​25
BOURGEOISIFYING​25
BUTTERFLYFISHES​29
COCKNEYFICATION​31
DEMYTHIFICATION​29
DIFFRANGIBILITY​28
DISINFLATIONARY​22
DISSATISFACTORY​24
DISSYLLABIFYING​28
FETISHISTICALLY​26
14 letter words (106 words)
PROFESSIONALLY​22
UNSATISFACTORY​22
SCIENTIFICALLY​24
SATISFACTORILY​22
DIFFERENTIALLY​24
AFFECTIONATELY​25
PREFERENTIALLY​22
CONFIDENTIALLY​23
INSUFFICIENTLY​25
INTERFEROMETRY​22
ENFORCEABILITY​24
HYPERINFLATION​25
SUPERFICIALITY​24
FORESEEABILITY​22
MULTIFREQUENCY​33
FALSIFIABILITY​25
CLASSIFICATORY​24
SULFINPYRAZONE​31
PERFECTIBILITY​26
REFERENTIALITY​20
13 letter words (194 words)
SIGNIFICANTLY​22
FUNCTIONALITY​21
PROFITABILITY​23
AFFORDABILITY​25
CONFECTIONERY​23
DYSFUNCTIONAL​22
INSUFFICIENCY​26
FANTASTICALLY​21
SUPERFICIALLY​23
AFFIRMATIVELY​27
MAGNIFICENTLY​24
CONFECTIONARY​23
DISQUALIFYING​30
INFALLIBILITY​21
FRIGHTENINGLY​24
INFLEXIBILITY​28
NONCONFORMITY​23
INDIFFERENTLY​23
FRUSTRATINGLY​20
INEFFICIENTLY​24
12 letter words (247 words)
SPECIFICALLY​24
SATISFACTORY​20
SUFFICIENTLY​23
INFLAMMATORY​22
INDEFINITELY​19
FIBROMYALGIA​23
FUNCTIONALLY​20
ARTIFICIALLY​20
REFLECTIVITY​23
INFREQUENTLY​27
INFLATIONARY​18
INEFFICIENCY​25
DELIGHTFULLY​23
DEFINITIVELY​22
INTENSIFYING​19
BENEFICIALLY​22
FLAMMABILITY​24
REFRESHINGLY​22
MEANINGFULLY​21
DIVERSIFYING​23
11 letter words (278 words)
EFFECTIVELY​25
FLEXIBILITY​26
IDENTIFYING​19
EFFICIENTLY​22
DIFFERENTLY​21
BEAUTIFULLY​19
FEASIBILITY​19
FILMOGRAPHY​25
DYSFUNCTION​20
BENEFICIARY​21
PROFICIENCY​23
FINANCIALLY​19
SPECIFICITY​23
INFERTILITY​17
FAMILIARITY​19
SUFFICIENCY​24
SIMPLIFYING​22
SUPERFAMILY​21
CONFIDENTLY​20
CLASSIFYING​20
10 letter words (305 words)
EFFICIENCY​23
DEFINITELY​17
DIFFICULTY​22
OFFICIALLY​21
QUALIFYING​26
DEFICIENCY​21
SATISFYING​17
SPECIFYING​21
LIFESTYLES​16
CONFORMITY​20
FRATERNITY​16
INFINITELY​16
FAITHFULLY​22
UNIFORMITY​18
CLARIFYING​19
CERTIFYING​19
TERRIFYING​17
INFORMALLY​18
MAGNIFYING​20
JUSTIFYING​24
9 letter words (269 words)
LIFESTYLE​15
FERTILITY​15
BOYFRIEND​18
MODIFYING​19
VERIFYING​19
UNIFORMLY​17
FIDUCIARY​18
INDEMNIFY​18
NOTIFYING​16
PAINFULLY​17
MIDWIFERY​21
PROFANITY​17
SUBFAMILY​19
INTENSIFY​15
FAIRYTALE​15
DIVERSIFY​19
JELLYFISH​25
INFIRMARY​17
BIOSAFETY​17
PURIFYING​18
8 letter words (213 words)
FRIENDLY​15
FACILITY​16
IDENTIFY​15
INFINITY​14
INFANTRY​14
EFFICACY​21
SIMPLIFY​18
FIDELITY​15
AFFINITY​17
CLASSIFY​16
REFINERY​14
QUANTIFY​23
FELICITY​16
FATALITY​14
UNFAIRLY​14
UNIFYING​15
FIERCELY​16
FORCIBLY​18
FAIRWAYS​17
FUTILITY​14
7 letter words (184 words)
FINALLY​13
SPECIFY​17
TIFFANY​16
QUALIFY​22
SATISFY​13
BRIEFLY​15
JUSTIFY​20
CLARIFY​15
FISHERY​16
CERTIFY​15
FIRSTLY​13
TESTIFY​13
FIREFLY​16
FAIRWAY​16
CHIEFLY​18
SWIFTLY​16
THRIFTY​16
INFANCY​15
SIGNIFY​14
MAGNIFY​16
6 letter words (87 words)
FAMILY​14
NOTIFY​12
MODIFY​15
FLYING​13
VERIFY​15
FAIRLY​12
FIRMLY​14
FINELY​12
FILTHY​15
FRUITY​12
FRYING​13
RATIFY​12
PURIFY​14
FLIMSY​14
FEISTY​12
SPIFFY​17
FLIRTY​12
INFAMY​14
FRISKY​16
SHIFTY​15
5 letter words (25 words)
FIFTY​14
FAIRY​11
NIFTY​11
FIERY​11
FISHY​14
FILMY​13
UNIFY​11
FILLY​11
JIFFY​21
FIZZY​29
WIFEY​14
MIFFY​16
FINNY​11
EDIFY​12
BIFFY​16
FITLY​11
REIFY​11
FIGGY​13
DEIFY​12
FISTY​11
4 letter words
IFFY​13
FIKY​14