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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 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 dichlorodifluoromethane 23
21 hexamethylenetetramines 23
22 carboxymethylcelluloses 23
23 indistinguishablenesses 23
24 intersubstitutabilities 23
25 deinstitutionalizations 23
26 nonrepresentationalisms 23
27 reinstitutionalizations 23
28 immunohistochemistries 22
29 reinstitutionalization 22
30 deinstitutionalization 22
31 nonrepresentationalism 22
32 carboxymethylcellulose 22
33 incomprehensiblenesses 22
34 indistinguishabilities 22
35 intercomprehensibility 22
36 hexamethylenetetramine 22
37 countercountermeasures 22
38 counterinterpretations 22
39 counterrevolutionaries 22
40 disestablishmentarians 22
41 electroencephalographs 22
42 electroencephalography 22
43 electrophysiologically 22
44 overcommercializations 22
45 spectrophotometrically 22
46 philoprogenitivenesses 22
47 phosphoglyceraldehydes 22
48 constitutionalizations 22
49 otorhinolaryngological 22
50 otorhinolaryngologists 22
51 unrepresentativenesses 22
52 keratoconjunctivitides 22
53 keratoconjunctivitises 22
54 encephalomyocarditises 22
55 establishmentarianisms 22
56 microspectrophotometer 22
57 microspectrophotometry 22
58 establishmentarianism 21
59 meningoencephalitides 21
60 microminiaturizations 21
61 tetrahydrocannabinols 21
62 acetylcholinesterases 21
63 adrenocorticosteroids 21
64 adrenocorticotrophins 21
65 anthropomorphizations 21
66 antiauthoritarianisms 21
67 antiferromagnetically 21
68 pseudocholinesterases 21
69 clinicopathologically 21
70 stereomicroscopically 21
71 straightforwardnesses 21
72 compartmentalizations 21
73 constitutionalization 21
74 contemporaneousnesses 21
75 otorhinolaryngologies 21
76 otorhinolaryngologist 21
77 phosphoglyceraldehyde 21
78 photolithographically 21
79 photophosphorylations 21
80 electrocardiographies 21
81 electroencephalograms 21
82 electroencephalograph 21
83 electromyographically 21
84 electroretinographies 21
85 overcommercialization 21
86 overintellectualizing 21
87 disadvantageousnesses 21
88 disestablishmentarian 21
89 multidimensionalities 21
90 unconstitutionalities 21
91 undemonstrativenesses 21
92 unexceptionablenesses 21
93 buckminsterfullerenes 21
94 countercountermeasure 21
95 counterdemonstrations 21
96 counterinterpretation 21
97 neuroendocrinological 21
98 neuroendocrinologists 21
99 nondenominationalisms 21
100 pseudosophistications 21


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