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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 microelectrophoretically 24
8 microspectrophotometries 24
9 overintellectualizations 24
10 dichlorodifluoromethanes 24
11 electrocardiographically 24
12 electroencephalographers 24
13 electroencephalographies 24
14 intercomprehensibilities 24
15 electroencephalographer 23
16 electroencephalographic 23
17 indistinguishablenesses 23
18 dichlorodifluoromethane 23
19 nonrepresentationalisms 23
20 carboxymethylcelluloses 23
21 intersubstitutabilities 23
22 overintellectualization 23
23 deinstitutionalizations 23
24 reinstitutionalizations 23
25 hexamethylenetetramines 23
26 microspectrophotometers 23
27 microspectrophotometric 23
28 countercountermeasures 22
29 counterinterpretations 22
30 counterrevolutionaries 22
31 hexamethylenetetramine 22
32 microspectrophotometer 22
33 microspectrophotometry 22
34 philoprogenitivenesses 22
35 phosphoglyceraldehydes 22
36 unrepresentativenesses 22
37 deinstitutionalization 22
38 reinstitutionalization 22
39 carboxymethylcellulose 22
40 overcommercializations 22
41 constitutionalizations 22
42 nonrepresentationalism 22
43 spectrophotometrically 22
44 establishmentarianisms 22
45 keratoconjunctivitides 22
46 keratoconjunctivitises 22
47 disestablishmentarians 22
48 immunohistochemistries 22
49 electroencephalographs 22
50 electroencephalography 22
51 electrophysiologically 22
52 encephalomyocarditises 22
53 incomprehensiblenesses 22
54 indistinguishabilities 22
55 intercomprehensibility 22
56 otorhinolaryngological 22
57 otorhinolaryngologists 22
58 clinicopathologically 21
59 electrocardiographies 21
60 electroencephalograms 21
61 electroencephalograph 21
62 electromyographically 21
63 electroretinographies 21
64 incomprehensibilities 21
65 indistinguishableness 21
66 institutionalizations 21
67 interchangeablenesses 21
68 interconvertibilities 21
69 internationalizations 21
70 otorhinolaryngologies 21
71 otorhinolaryngologist 21
72 disadvantageousnesses 21
73 disestablishmentarian 21
74 hypercholesterolemias 21
75 hypersusceptibilities 21
76 immunocytochemistries 21
77 immunoelectrophoreses 21
78 immunoelectrophoresis 21
79 immunoelectrophoretic 21
80 neuroendocrinological 21
81 neuroendocrinologists 21
82 straightforwardnesses 21
83 buckminsterfullerenes 21
84 establishmentarianism 21
85 extraterritorialities 21
86 tetrahydrocannabinols 21
87 anthropomorphizations 21
88 antiauthoritarianisms 21
89 compartmentalizations 21
90 constitutionalization 21
91 contemporaneousnesses 21
92 nondenominationalisms 21
93 stereomicroscopically 21
94 intersubstitutability 21
95 overcommercialization 21
96 overintellectualizing 21
97 unexceptionablenesses 21
98 acetylcholinesterases 21
99 adrenocorticosteroids 21
100 adrenocorticotrophins 21


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