Countable Nouns Ending in IS and Containing TH

Browse 126 valid English countable nouns ending in IS and containing TH, from Thesis, Hypothesis, Synthesis, Arthritis, Parenthesis, Antithesis and Catharsis to rarer terms. Check definitions and spelling below, or visit our noun grammar guide to review singular and plural count rules.

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Starts with A
18 words
arthritis
antithesis
apotheosis
arthrodesis
arthrosis
anthemis
anthesis
anthropomorphosis
aesthesis
anthroponosis
amphiarthrosis
antimetathesis
athetesis
arthrochondritis
anacatharsis
amphidiarthrosis
anthraconecrosis
amygdalothripsis
Starts with B
6 words
biosynthesis
bothriolepis
broncholithiasis
blepharolithiasis
brenthis
bothriocidaris
Starts with C
9 words
catharsis
cholelithiasis
cathexis
cantharis
counterhypothesis
chondroarthritis
cleidarthritis
cleistothecopsis
cylindrarthrosis
Starts with D
4 words
diathesis
diarthrosis
diorthosis
diasynthesis
Starts with E
18 words
ethnogenesis
electrosynthesis
epenthesis
erythrocytosis
epithesis
enarthrosis
epanorthosis
esthesis
ethmoiditis
eranthis
ethanolysis
ecthlipsis
encanthis
endolabyrinthitis
enanthesis
epidiorthosis
esthesioneurosis
esoethmoiditis
Starts with H
3 words
hypothesis
helminthiasis
hydrarthrosis
Starts with I
2 words
ichthyosis
ichthyornis
Starts with L
2 words
lithiasis
lecythis
Starts with M
4 words
metathesis
mythopoesis
mythogenesis
macrothelypteris
Starts with N
3 words
nearthrosis
nephthytis
narcocatharsis
Starts with O
9 words
osteoarthrosis
orthosis
ophthalmomycosis
ophthalmodiagnosis
ophthalmomyositis
ophthalmoneuritis
orthoaxis
olecranarthritis
ophthalmorrhexis
Starts with P
15 words
parenthesis
prosthesis
pathogenesis
polyarthritis
prothesis
phlebothrombosis
pseudarthrosis
pseudoarthrosis
panophthalmitis
parathesis
parasynthesis
pseudoparthenogenesis
perineosynthesis
periophthalmitis
pyolabyrinthitis
Starts with R
1 words
resynthesis
Starts with S
10 words
synthesis
spondylolisthesis
synarthrosis
spondylarthritis
sialolithiasis
struthiopteris
synthyris
synanthesis
streptothricosis
spondylexarthrosis
Starts with T
18 words
thesis
thrombosis
thrombolysis
thyroiditis
thyrotoxicosis
thoracentesis
thrombophlebitis
thermolysis
thoracocentesis
thanatopsis
thlipsis
theriomorphosis
thromboarteritis
thrombolymphangitis
thermopsis
thoracogastroschisis
thetris
thoracoceloschisis
Starts with U
2 words
urethritis
urolithiasis
Starts with X
2 words
xanthomatosis
xanthoxalis

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