What are some seven-letter South American rivers?

23 of the 122 South American rivers in Icillion have exactly 7 letters, for example Orinoco, Madeira and Uruguay.

Which seven-letter South American rivers start with M?

M is the most common first letter here, with 5 names, such as Madeira, Mantaro, Mapocho, Maranon and Miranda.

Geography · lists

23 seven-letter South American rivers in alphabetical order, from “Berbice” to “Uruguay”. Each one counts as an answer in Icillion.

23 of the 122 South American rivers have exactly 7 letters (19%).
Most start with M (5), C (3) and B (2).
Only names of one word are counted, and only their letters: spaces, hyphens and apostrophes are not.

What are some seven-letter South American rivers?: 23 of the 122 South American rivers in Icillion have exactly 7 letters, for example Orinoco, Madeira and Uruguay.
Which seven-letter South American rivers start with M?: M is the most common first letter here, with 5 names, such as Madeira, Mantaro, Mapocho, Maranon and Miranda.

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