ice axe vs piolet

ice axe and piolet both are nouns.

Word	Noun	Adjective	Verb	Adverb
ice axe	Yes	No	No	No
piolet	Yes	No	No	No

As nouns, ice axe and piolet are synonyms defined as:

ice axe and piolet: an ax used by mountain climbers for cutting footholds in ice

Other synonyms of ice axe include ice ax.

ice axe (noun)	piolet (noun)
an ax used by mountain climbers for cutting footholds in ice	an ax used by mountain climbers for cutting footholds in ice