Uncountable Nouns That Start with R and End with US

Explore 9 verified English uncountable nouns starting with R and ending with US, including Rhinovirus, Rotavirus, Rufous, Resus, Risus, Ruscus and Radiophosphorus. 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 RA
1 words
radiophosphorus
Starts with RE
2 words
regulus
resus
Starts with RH
1 words
rhinovirus
Starts with RI
1 words
risus
Starts with RO
2 words
rotavirus
rosmarinus
Starts with RU
2 words
rufous
ruscus

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