zeta key vs Unbrako wrench

zeta key and Unbrako wrench both are nouns.

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

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

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

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