Countable Nouns Starting with OCTO and Containing O

Explore 22 verified English countable nouns starting with OCTO and containing O, including Octopus, Octogenarian, Octothorp, Octocopter, Octothorpe, Octoroon and Octopod. 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 OCTOC
2 words
octocopter
octocentenary
Starts with OCTOD
2 words
octodecimo
octodecillion
Starts with OCTOF
1 words
octofoil
Starts with OCTOG
2 words
octogenarian
octogenary
Starts with OCTON3 words
octonary
octonarius
octonarian
Starts with OCTOP6 words
octopus
octopod
octopoid
octoploid
octopodan
octopusher
Starts with OCTOR
1 words
octoroon
Starts with OCTOS3 words
octosyllabic
octosyllable
octostyle
Starts with OCTOT
2 words
octothorp
octothorpe

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