Countable Nouns Ending in UM and Containing S
Browse 424 valid English countable nouns ending in UM and containing S, from Sum, Museum, Stadium, Spectrum, Asylum, Consortium and Serum 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
17 words asylum
antiserum
alyssum
adsum
abomasum
adstratum
asarum
aspergillum
aspidium
appressorium
asplenium
aspersorium
ascidium
androsporangium
archesporium
ascogonium
amphigastrium
Starts with B
2 words basidium
brosimum
Starts with C
24 words consortium
colosseum
coliseum
capsicum
chrysanthemum
checksum
clostridium
cryptosporidium
conservatorium
callosum
cusum
cestrum
claustrum
castellum
cladosporium
causatum
cephalosporium
clausum
closterium
crissum
cynoglossum
cestum
cerastium
crassamentum
Starts with D
14 words disequilibrium
desideratum
dorsum
demonstrandum
depositum
designatum
desiderium
desmodium
dichasium
dimensum
desmepithelium
diclesium
disciplinarium
desmidium
Starts with E
24 words elysium
endomysium
equisetum
epigastrium
endosteum
epimysium
emplastrum
ergastulum
episternum
ensisternum
ecomuseum
exosporium
endostracum
erysimum
expansum
entomosporium
evangelistarium
episporangium
emissarium
eusporangium
entosternum
exobasidium
endosporium
endosternum
Starts with F
6 words frustum
fusarium
fideicommissum
falsum
fastigium
fastidium
Starts with G
5 words gymnasium
gelsemium
grassum
gynostemium
gastraeum
Starts with H
11 words hospitium
hippeastrum
helichrysum
haustorium
hedysarum
hypogastrium
helminthosporium
hesperidium
haustellum
hymenosporum
humstrum
Starts with I
5 words ischium
insectarium
indusium
infusorium
interministerium
Starts with J
1 words jasminum
Starts with L
8 words lustrum
leprosarium
ligustrum
leptospermum
lithospermum
leucospermum
lectisternium
laserpicium
Starts with M
22 words museum
mausoleum
mediastinum
magisterium
molluscum
meerschaum
marsupium
mesothelium
menstruum
ministerium
microsporangium
megasporangium
mesogastrium
macrosporangium
mesembryanthemum
malvastrum
monochasium
mashlum
myosotidium
metapostscutellum
menispermum
muscatorium
Starts with N
3 words nasturtium
nostrum
nitrosobacterium
Starts with O
14 words opossum
ostium
omasum
osculum
opusculum
osmiridium
ostensorium
osteospermum
organistrum
ossarium
osmeterium
osteoglossum
odontoglossum
opsonium
Starts with P
24 words possum
proscenium
presidium
psyllium
plasmodium
positronium
periosteum
pittosporum
pennisetum
pseudopodium
phosphonium
perimysium
prostomium
paspalum
presternum
pessimum
postulatum
psalterium
periostracum
pastorium
pityrosporum
postliminium
prosternum
parascenium
Starts with Q
1 words quaesitum
Starts with R
12 words rostrum
residuum
responsum
radiostrontium
rosarium
rostellum
resilium
respectum
rastrum
rhynchosporium
respiratorium
restibrachium
Starts with S
24 words sum
stadium
spectrum
serum
slum
symposium
scum
stratum
scrum
strum
septum
scrotum
sanctum
sternum
sorghum
speculum
sputum
sanatorium
solarium
sanitarium
simulacrum
sacrum
striatum
substratum
Starts with T
6 words transuranium
testatum
trachelospermum
tripleurospermum
tetrasporangium
trichosporangium
Starts with U
1 words understratum
Starts with V
8 words vestibulum
verbascum
vulsellum
vestigium
vasculum
veronicastrum
viscum
vivisectorium
Starts with X
2 words xiphisternum
xiphosternum
Starts with Z
3 words zoosporangium
zygosporangium
zoospermium