source: different sources cite different heights for several mountains, heights mentioned above are a best guess only. Also, sometimes it is not clear whether a peak is a solitary peak surrounded by other very high solitary peaks or a peak as part of a mountain with more than one very high peak. When a peak is part of a mountain with higher peaks, it is not mentioned.
note: For more information on mountain peaks check out Peaklist.org.
note: Mount Everest aka Sagarmatha aka Zhumulangma Feng; K2 aka Qogir aka Godwin Austen; Shishapangma aka Gosainthan aka Xixabangma (Feng).