Climber
WordNet
noun
(1) An iron spike attached to the shoe to prevent slipping on ice when walking or climbing
(2) Someone who climbs as a sport; especially someone who climbs mountains
"The lead climber looked strong still but his partner often slumped in his ropes"
(3) Someone who ascends on foot
"A solitary mounter of the staircase"
(4) Someone seeking social prominence by obsequious behavior
(5) A vine or climbing plant that readily grows up a support or over other plants