Countable Nouns That Start with I and End with US

Explore 18 verified English countable nouns starting with I and ending with US, including Impetus, Intravenous, Isthmus, Ignoramus, Incubus, Ileus and Incus. Sort these count nouns with singular and plural forms by word length for ESL grammar practice, determiner usage, and plural spelling below, or review singular and plural count rules in our noun grammar guide.

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Starts with IA
1 words
iambus
Starts with IC3 words
ictus
ichthyosaurus
ichthyophthirius
Starts with IG
1 words
ignoramus
Starts with IL
2 words
ileus
iliacus
Starts with IM
1 words
impetus
Starts with IN7 words
intravenous
incubus
incus
influenzavirus
introitus
interradius
inflatus
Starts with IS
2 words
isthmus
ischiocavernosus
Starts with IT
1 words
ithyphallus

•Browse Countable Nouns by Letter (A to Z)

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