Countable Nouns That Start with OR and End with IS

Explore 10 verified English countable nouns starting with OR and ending with IS, including Organogenesis, Orris, Orbicularis, Orchis, Orthosis, Orogenesis and Ornis. 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 ORB
1 words
orbicularis
Starts with ORC
2 words
orchis
orchiepididymitis
Starts with ORE
1 words
orexis
Starts with ORG
1 words
organogenesis
Starts with ORN
1 words
ornis
Starts with ORO
1 words
orogenesis
Starts with ORR
1 words
orris
Starts with ORT
2 words
orthosis
orthoaxis

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