Conversation so far:
what is the name of the highest mountain in south america
Aconcagua is highest mountain in South America.
how high is the aconcagua
At 22,837 feet, not only is it the highest mountain in South America, it is the tallest in all of the Americas, as well as the Southern and Western Hemispheres.
what is the tallest mountain worldwide
The peak of Mount Everest is 8,850 meters above sea level. No other mountain on Earth has a higher altitude. However, some mountains might be considered taller.

Question: are there any considered taller than everest
Self-contained rewrite: are there any mountains considered taller than mount everest