Similar words
murmullo
murmullo and runrún are close synonyms for "murmur"; runrún is more colloquial, and also means "a rumor going around."
Similar in other languages
Portuguese
burburinho
burburinho is the Portuguese word for the same thing — both mean "murmur."
Portuguese
murmúrio
murmúrio is the Portuguese word for the same thing — both mean "murmur."
Practice
1 What does runrún mean?
murmur
2 Fill the gap: Hay un ___ en la sala.
Full sentence: Hay un runrún en la sala. (There's a murmur in the room.)
3 Which fingerprint chart matches runrún?
runrún: neutral register, academic frequency, general domain, neutral connotation.