Countable Nouns That Start with OR and End with UM

Explore 7 verified English countable nouns starting with OR and ending with UM, including Organum, Origanum, Ornithogalum, Orarium, Organistrum, Orontium and Ordalium. 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 ORA
1 words
orarium
Starts with ORD
1 words
ordalium
Starts with ORG
2 words
organum
organistrum
Starts with ORI
1 words
origanum
Starts with ORN
1 words
ornithogalum
Starts with ORO
1 words
orontium

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