alpinist

As nouns the difference between mountaineer and alpinist

is that mountaineer is someone who climbs mountains for sport or pleasure while alpinist is a mountain climber, especially in the European Alps or in ranges of similar ruggedness and elevation.

As an adjective alpinist is

of or pertaining to alpinism.

As nouns the difference between taxonomy and alpinist

is that taxonomy is the science or the technique used to make a classification while alpinist is (sometimes|capitalized) a mountain climber, especially in the european alps or in ranges of similar ruggedness and elevation.

As an adjective alpinist is

of or pertaining to alpinism.