Uncountable Nouns That Start with OPA

Browse 7 English uncountable nouns starting with the prefix OPA, including Opaque, Opacity, Opal, Opaqueness, Opalescence, Opaline and Opacification. Sort these mass nouns and non-count terms for substances and concepts by letter count for quantifier accuracy, academic writing, and ESL study, or consult our noun grammar guide.

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Starts with OPAC
2 words
opacity
opacification
Starts with OPAL
3 words
opal
opalescence
opaline
Starts with OPAQ
2 words
opaque
opaqueness

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