frame of reference vs coordinate axis

frame of reference and coordinate axis both are nouns.

Word	Noun	Adjective	Verb	Adverb
frame of reference	Yes	No	No	No
coordinate axis	Yes	No	No	No

frame of reference (noun)	coordinate axis (noun)
a system that uses coordinates to establish position	one of the fixed reference lines of a coordinate system
a system of assumptions and standards that sanction behavior and give it meaning