climber vs mounter

climber and mounter both are nouns.

Word	Noun	Adjective	Verb	Adverb
climber	Yes	No	No	No
mounter	Yes	No	No	No

As nouns, climber and mounter are synonyms defined as:

climber (noun)	mounter (noun)
an iron spike attached to the shoe to prevent slipping on ice when walking or climbing	someone who ascends on foot
someone who climbs as a sport; especially someone who climbs mountains	a skilled worker who mounts pictures or jewels etc.
someone seeking social prominence by obsequious behavior
someone who ascends on foot
a vine or climbing plant that readily grows up a support or over other plants