box wrench vs box end wrench

box wrench and box end wrench both are nouns.

Word	Noun	Adjective	Verb	Adverb
box wrench	Yes	No	No	No
box end wrench	Yes	No	No	No

As nouns, box wrench and box end wrench are synonyms defined as:

box wrench and box end wrench: a wrench with a closed loop (a socket) that fits over a nut or bolt head

box wrench (noun)	box end wrench (noun)
a wrench with a closed loop (a socket) that fits over a nut or bolt head	a wrench with a closed loop (a socket) that fits over a nut or bolt head