nut tool vs nut key

nut tool and nut key both are nouns.

Word	Noun	Adjective	Verb	Adverb
nut tool	Yes	No	No	No
nut key	Yes	No	No	No

As nouns, nut tool and nut key are synonyms defined as:

nut tool and nut key: (mountaineering) a tool for extracting a nut, chock, etc, from a crack after use.

nut tool (noun)	nut key (noun)
(mountaineering) a tool for extracting a nut, chock, etc, from a crack after use.	(mountaineering) a tool for extracting a nut, chock, etc, from a crack after use.