9 Letter Countable Nouns Starting with OS

Browse 15 valid English 9 letter countable nouns that start with OS, from Ostracism, Osteopath, Osteocyte, Osteotomy, Osmanthus, Osmometer and Osteoderm to rarer terms. Check definitions and spelling below, or visit our noun grammar guide to review singular and plural count rules.

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Starts with OSC
2 words
oscitancy
oscitance
Starts with OSM
2 words
osmanthus
osmometer
Starts with OSS
2 words
ossifrage
ossifraga
Starts with OST9 words
ostracism
osteopath
osteocyte
osteotomy
osteoderm
osteotome
ostensory
ostracean
ostleress

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