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


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