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


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