Countable Nouns Starting with INV and Containing IO

Explore 13 verified English countable nouns starting with INV and containing IO, including Investigation, Invention, Invitation, Invasion, Inversion, Invocation and Invitational. Browse these count nouns with singular and plural forms below, or review singular and plural count rules in our noun grammar guide.

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Starts with INVA3 words
invasion
invalidation
invagination
Starts with INVE3 words
investigation
invention
inversion
Starts with INVI4 words
invitation
invitational
invigoration
invigilation
Starts with INVO
2 words
invocation
involution
Starts with INVU
1 words
invultuation

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