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


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