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


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