Countable Nouns Ending in IS and Containing O
This list gathers 866 English countable nouns ending in IS and containing O, such as Diagnosis, Louis, Hypothesis, Prognosis, Oasis, Synopsis and Metropolis. Use the sorting controls below to organize entries by length, or consult our noun grammar guide to review singular and plural count rules.
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Starts with A
24 words adonis
acropolis
apotheosis
acidosis
amniocentesis
amyloidosis
anastomosis
autolysis
arabidopsis
alkalosis
allantois
apoapsis
apophysis
apomixis
aponeurosis
arthrodesis
aspergillosis
anamorphosis
ankylosis
aerotropolis
avitaminosis
apophasis
alveolitis
amaurosis
Starts with B
24 words bourgeois
biosynthesis
beaujolais
biocatalysis
bombogenesis
bronchiectasis
bavarois
blastomycosis
bacteriolysis
blepharoconjunctivitis
bacteriosis
barachois
biocenosis
bothriolepis
bronchostenosis
bronchiostenosis
bronchomycosis
blepharophimosis
broncholithiasis
blepharostenosis
blepharolithiasis
botryomycosis
bronchoaspergillosis
biolysis
Starts with C
24 words clitoris
colitis
chamois
cirrhosis
conjunctivitis
clovis
cyanosis
coulis
carcinogenesis
chinois
cytokinesis
charolais
cholelithiasis
croquis
coreopsis
cholangitis
commis
coccidiosis
chondromatosis
clafoutis
chemoprophylaxis
cysticercosis
corydalis
cosmopolis
Starts with D
24 words diagnosis
doris
dermatosis
dauphinois
dermatophytosis
diarthrosis
diadophis
dermatomycosis
dermomycosis
diapophysis
deplasmolysis
desmosis
diorthosis
desmorrhexis
dermatoneurosis
dendrophis
dermamycosis
dictyopteris
dermatozoonosis
dicranopteris
diaporesis
dactylosymphysis
dermapostasis
dermatoconiosis
Starts with E
24 words esophagitis
epiglottis
electrophoresis
endocytosis
epiglottitis
encephalomyelitis
exocytosis
ecchymosis
ethnogenesis
endodermis
exosmosis
endosymbiosis
enterocolitis
electrosynthesis
endosmosis
erythrocytosis
exostosis
empyrosis
enhypostasis
entamoebiasis
erminois
erotesis
enarthrosis
enteroclysis
Starts with F
8 words fortis
follis
frontolysis
fontinalis
fasciolopsis
flagellosis
fasciodesis
fibropericarditis
Starts with G
16 words gastroenteritis
glottis
gametogenesis
glomerulonephritis
gliosis
glossitis
gomphosis
granulosis
gummosis
gliomatosis
gastroanastomosis
gastroduodenitis
gastroenterocolitis
gastroenteroanastomosis
gastrocoloptosis
gerontomorphosis
Starts with H
24 words hypothesis
hypnosis
hydrolysis
hemodialysis
hemochromatosis
hypophysis
hypostasis
hypodermis
hemerocallis
hydronephrosis
hyperkeratosis
hyperlordosis
hyperostosis
hypervitaminosis
hallucinosis
heterotaxis
haliotis
heliopsis
homolysis
hydrogenolysis
hematolysis
hesperornis
heterokaryosis
heterolysis
Starts with I
14 words iconostasis
ichthyosis
iontophoresis
immunoelectrophoresis
immunodiagnosis
ionophoresis
ichthyornis
ideopolis
illadopsis
ixodiasis
immunophoresis
ipomopsis
isoplexis
iridochoroiditis
Starts with K
10 words ketoacidosis
kurtosis
kyphosis
keratosis
keratoconjunctivitis
karyokinesis
keratomileusis
karyolysis
kenogenesis
kyllosis
Starts with L
21 words louis
loris
lipolysis
lordosis
lycoris
lyonnais
leukocytosis
lipomatosis
lymphocytosis
leucosis
leukosis
lymphogranulomatosis
leonotis
leukoencephalitis
lipidosis
lyolysis
lymphosarcomatosis
lipoidosis
leptodermis
laryngoparalysis
laryngovestibulitis
Starts with M
24 words metropolis
metamorphosis
morris
meiosis
misdiagnosis
mitosis
megalopolis
mastoiditis
metempsychosis
myotis
meningoencephalitis
miosis
mycosis
melioidosis
melanosis
microanalysis
myosotis
mycotoxicosis
mythopoesis
morphosis
mythogenesis
morphallaxis
mucopolysaccharidosis
meconopsis
Starts with N
19 words neurosis
necrosis
necropolis
narcosis
nephrosis
noncrisis
neurolysis
neurohypophysis
nearthrosis
narcoanalysis
nephroptosis
nephrolepis
notornis
nonmetamorphosis
narcocatharsis
nomocharis
nephroangiosclerosis
nephrocoloptosis
neurochorioretinitis
Starts with O
24 words oasis
osmosis
overemphasis
overdiagnosis
overanalysis
osteonecrosis
osteomyelitis
organogenesis
orris
orbicularis
oxalis
orchis
osteoarthrosis
osteopetrosis
orthosis
orogenesis
onomatopoiesis
ozonolysis
occipitofrontalis
ornis
ovotestis
onychocryptosis
orexis
osteoclasis
Starts with P
24 words prognosis
psychosis
psychoanalysis
psoriasis
prosthesis
patois
prophylaxis
pathogenesis
proboscis
pyrolysis
prostatitis
polis
portcullis
phagocytosis
prolepsis
proteolysis
pneumonitis
phimosis
protasis
ptosis
parotitis
pneumoconiosis
pneumocystis
psychoneurosis
Starts with Q
1 words quebecois
Starts with R
9 words restenosis
radiolysis
resinosis
rheotaxis
rhinopharyngitis
rhodohypoxis
rhaphiolepis
rhipsalidopsis
radioanaphylaxis
Starts with S
24 words synopsis
sclerosis
symbiosis
scoliosis
stenosis
stomatitis
spondylosis
spondylolisthesis
stephanotis
seychellois
synchondrosis
synovitis
syndesmosis
synarthrosis
spondylolysis
semiosis
solenopsis
synostosis
stereotaxis
serodiagnosis
sorosis
solvolysis
spirochetosis
spondylarthritis
Starts with T
24 words thrombosis
trois
thrombolysis
trypanosomiasis
thyroiditis
tendinosis
thyrotoxicosis
travois
torticollis
thoracentesis
thrombophlebitis
temporalis
toxicosis
tenosynovitis
tracheobronchitis
tsoris
thermolysis
thoracocentesis
thanatopsis
technopolis
tylosis
tendovaginitis
tenovaginitis
tetrapolis
Starts with U
7 words underdiagnosis
urolithiasis
ulosis
urosis
ureterostegnosis
ureteropyelonephritis
ureterocystanastomosis
Starts with V
8 words vaginosis
vaudois
vulvovaginitis
vibriosis
vichyssois
virosis
varicosis
visceroptosis
Starts with W
2 words whosis
whoosis
Starts with X
5 words xanthomatosis
xenodiagnosis
xenogenesis
xenomorphosis
xanthoxalis
Starts with Z
9 words zoonosis
zygapophysis
zygosis
zymosis
zymolysis
zygolabialis
zoosis
zygomaticoauricularis
zygopteris