Longest English Words

Longest English Words. A list of the top 100 longest words in the English language using a Scrabble dictionary.

RankWord# Letters
1 ethylenediaminetetraacetates 28
2 ethylenediaminetetraacetate 27
3 electroencephalographically 27
4 immunoelectrophoretically 25
5 phosphatidylethanolamines 25
6 phosphatidylethanolamine 24
7 overintellectualizations 24
8 intercomprehensibilities 24
9 dichlorodifluoromethanes 24
10 microelectrophoretically 24
11 microspectrophotometries 24
12 electrocardiographically 24
13 electroencephalographers 24
14 electroencephalographies 24
15 electroencephalographer 23
16 electroencephalographic 23
17 nonrepresentationalisms 23
18 deinstitutionalizations 23
19 dichlorodifluoromethane 23
20 microspectrophotometers 23
21 microspectrophotometric 23
22 carboxymethylcelluloses 23
23 indistinguishablenesses 23
24 intersubstitutabilities 23
25 overintellectualization 23
26 hexamethylenetetramines 23
27 reinstitutionalizations 23
28 hexamethylenetetramine 22
29 reinstitutionalization 22
30 spectrophotometrically 22
31 encephalomyocarditises 22
32 establishmentarianisms 22
33 overcommercializations 22
34 immunohistochemistries 22
35 philoprogenitivenesses 22
36 phosphoglyceraldehydes 22
37 carboxymethylcellulose 22
38 incomprehensiblenesses 22
39 indistinguishabilities 22
40 intercomprehensibility 22
41 disestablishmentarians 22
42 microspectrophotometer 22
43 microspectrophotometry 22
44 deinstitutionalization 22
45 electroencephalographs 22
46 electroencephalography 22
47 electrophysiologically 22
48 nonrepresentationalism 22
49 constitutionalizations 22
50 unrepresentativenesses 22
51 countercountermeasures 22
52 counterinterpretations 22
53 counterrevolutionaries 22
54 otorhinolaryngological 22
55 otorhinolaryngologists 22
56 keratoconjunctivitides 22
57 keratoconjunctivitises 22
58 countercountermeasure 21
59 counterdemonstrations 21
60 counterinterpretation 21
61 otorhinolaryngologies 21
62 otorhinolaryngologist 21
63 anthropomorphizations 21
64 antiauthoritarianisms 21
65 antiferromagnetically 21
66 pseudosophistications 21
67 psychopharmacological 21
68 psychopharmacologists 21
69 psychophysiologically 21
70 psychotherapeutically 21
71 compartmentalizations 21
72 constitutionalization 21
73 contemporaneousnesses 21
74 neuroendocrinological 21
75 neuroendocrinologists 21
76 nondenominationalisms 21
77 electrocardiographies 21
78 electroencephalograms 21
79 electroencephalograph 21
80 electromyographically 21
81 electroretinographies 21
82 dendrochronologically 21
83 multidimensionalities 21
84 extraterritorialities 21
85 pseudocholinesterases 21
86 disadvantageousnesses 21
87 disestablishmentarian 21
88 meningoencephalitides 21
89 microminiaturizations 21
90 stereomicroscopically 21
91 straightforwardnesses 21
92 incomprehensibilities 21
93 indistinguishableness 21
94 institutionalizations 21
95 interchangeablenesses 21
96 interconvertibilities 21
97 internationalizations 21
98 intersubstitutability 21
99 hypercholesterolemias 21
100 hypersusceptibilities 21


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