Mountaineering is a noun.
The European term for mountaineering is usually mountaineering but it is occasionally called alpinism.
It's used in Mountaineering.
The base word of mountaineering is "mountain."
part of speech
The part of speech for this particular word is a noun.
adverb
what part of speech is work
what part of speech is beneath
Nehru Institute of Mountaineering was created in 1965.
Mountaineering Council of Scotland was created in 1970.
Croatian Mountaineering Association was created in 1874.
Scottish Mountaineering Club was created in 1889.