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


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