12 Letter Countable Nouns Ending in US

Browse 87 valid English 12 letter countable nouns that end with US, from Subconscious, Hippopotamus, Hypothalamus, Brontosaurus, Cumulonimbus, Enterococcus and Ankylosaurus 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
9 words
ankylosaurus
anencephalus
antibacchius
antoninianus
aechmophorus
anigozanthus
antibarbarus
anisostichus
anophthalmus
Starts with B
3 words
brontosaurus
basilosaurus
buccellarius
Starts with C
24 words
cumulonimbus
cirrostratus
cryptococcus
cirrocumulus
chimonanthus
catharanthus
cephalotaxus
cheirogaleus
cynocephalus
cumulocirrus
cephalanthus
cephalopagus
chaetopterus
centrocercus
callistephus
cerebratulus
chlamyphorus
chamaecistus
chilabothrus
cephalomelus
chlorococcus
centrodesmus
cephalodymus
celiadelphus
Starts with D
4 words
dendroctonus
dunkleosteus
dermatonosus
deradenoncus
Starts with E
14 words
enterococcus
echinococcus
elasmosaurus
edaphosaurus
elephantopus
eucinostomus
epistropheus
eschrichtius
echinocactus
exencephalus
erythrocebus
epiceratodus
eriocephalus
eubranchipus
Starts with H
3 words
hippopotamus
hypothalamus
hectocotylus
Starts with L
1 words
logodaedalus
Starts with M
3 words
megalosaurus
micronucleus
macronucleus
Starts with N
1 words
nimbostratus
Starts with O
1 words
oncornavirus
Starts with P
6 words
paranthropus
philadelphus
polyomavirus
pneumococcus
picornavirus
plectranthus
Starts with S
12 words
subconscious
sardanapalus
seismosaurus
scholasticus
sinanthropus
sivapithecus
strophanthus
schistosomus
symplocarpus
selenicereus
schistomelus
solenostomus
Starts with T
4 words
thiobacillus
trachycarpus
thaumaturgus
trachypterus
Starts with X
1 words
xenorhynchus

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