Uncountable Nouns That Start with O and End with SE

Explore 16 verified English uncountable nouns starting with O and ending with SE, including Offense, Overuse, Omakase, Oxidase, Outercourse, Overexercise and Osmose. 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.