Proper Nouns That Start with O and End with S

Explore 18 verified English proper nouns starting with O and ending with S, including Olympics, Owens, Oscars, Orleans, Olympus, Ozarks and Ordos. Sort these capitalized names for specific people, places, and organizations by word length for capitalization practice, trivia, and reference writing below, or review capitalization rules and examples in our noun grammar guide.

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Starts with OC
2 words
octans
octaplas
Starts with OD
1 words
odontornithes
Starts with OL3 words
olympics
olympus
olifants
Starts with OP
2 words
optimates
ophites
Starts with OR
2 words
orleans
ordos
Starts with OS
2 words
oscars
osteoglossiformes
Starts with OV
1 words
ovibos
Starts with OW
1 words
owens
Starts with OX3 words
oxus
oxyrhynchus
oxararfoss
Starts with OZ
1 words
ozarks

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