20 Letter Countable Nouns

Explore 92 verified English countable nouns with 20 letters, including Internationalization, Institutionalization, Counterrevolutionary, Compartmentalization, Electroencephalogram, Counterdemonstration and Anthropomorphization. Browse these count nouns with singular and plural forms alphabetically below, or review singular and plural count rules in our noun grammar guide.

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Starts with A14 words
anthropomorphization
acetylcholinesterase
antienvironmentalist
anarchoindividualist
antiinstitutionalist
adrenocorticosteroid
antianthropomorphism
anticonfederationist
antitintinnabularian
abdominohysterectomy
anthropomorphotheist
austrocylindropuntia
arteriosympathectomy
autodepolymerization
Starts with B5 words
buckminsterfullerene
bronchoesophagoscopy
bronchoaspergillosis
barothermohygrograph
benzofuroquinoxaline
Starts with C11 words
counterrevolutionary
compartmentalization
counterdemonstration
counterrevolutionist
cholecystgastrostomy
counterestablishment
counterexpostulation
cholecystenterostomy
cholecystnephrostomy
consubstantiationist
counterdisengagement
Starts with D
2 words
dimethylanthranilate
diphenylquinomethane
Starts with E3 words
electroencephalogram
encephalomeningocele
encephalomyocarditis
Starts with G
2 words
galvanocauterization
gastrohysterorrhaphy
Starts with H9 words
hypercholesterolemic
hydrodesulfurization
histoincompatibility
heteropolysaccharide
heterochromatization
hyperlipoproteinemia
hepaticoduodenostomy
homeotransplantation
hydroxyanthraquinone
Starts with I4 words
internationalization
institutionalization
intercrystallization
interdifferentiation
Starts with K
1 words
keratoconjunctivitis
Starts with L4 words
lymphogranulomatosis
lipochondrodystrophy
laparocholecystotomy
labyrinthibranchiate
Starts with M5 words
microminiaturization
meningoencephalocele
mediterraneanization
metaphenylenediamine
monobromoacetanilide
Starts with N4 words
noninterventionalist
nonrepresentationist
nephroangiosclerosis
neurochorioretinitis
Starts with O4 words
oophorosalpingectomy
ophthalmodynamometer
ophthalmothermometer
ophthalmodiastimeter
Starts with P13 words
photophosphorylation
paraphenylenediamine
palatopharyngoplasty
piezocrystallization
premisrepresentation
pancreatoenterostomy
pseudoconglomeration
protocatechualdehyde
pseudophenanthroline
phenylaceticaldehyde
pyopneumoperitonitis
pyopneumopericardium
phlebarteriodialysis
Starts with S
1 words
spectropyrheliometer
Starts with T4 words
thermopolymerization
thoracogastroschisis
tribromoacetaldehyde
trihemitetartemorion
Starts with U6 words
ureterosigmoidostomy
ultraphotomicrograph
ultrastandardization
uranostaphylorrhaphy
ureterosalpingostomy
unsubstantialization

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