Uncountable Nouns That Start with OS and End with TY

Explore 4 verified English uncountable nouns starting with OS and ending with TY, including Osmolarity, Osmolality, Osteoplasty and Ostensibility. Sort these mass nouns and non-count terms for substances and concepts by word length for quantifier accuracy, academic writing, and ESL study below, or check quantifier and measurement rules in our noun grammar guide.

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Starts with OSM
2 words
osmolarity
osmolality
Starts with OST
2 words
osteoplasty
ostensibility

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