zeta wrench vs hex key

zeta wrench and hex key both are nouns.

Word	Noun	Adjective	Verb	Adverb
zeta wrench	Yes	No	No	No
hex key	Yes	No	No	No

As nouns, zeta wrench and hex key are synonyms defined as:

Other synonyms of zeta wrench include Allen key, Inbus key, Inbus wrench, Unbrako key, Unbrako wrench, zeta key.

zeta wrench (noun)	hex key (noun)
a wrench for Allen screws	a wrench for Allen screws