coaxial cable vs coax cable

coaxial cable and coax cable both are nouns.

Word	Noun	Adjective	Verb	Adverb
coaxial cable	Yes	No	No	No
coax cable	Yes	No	No	No

As nouns, coaxial cable and coax cable are synonyms defined as:

coaxial cable and coax cable: a transmission line for high-frequency signals

Other synonyms of coaxial cable include coax.

coaxial cable (noun)	coax cable (noun)
a transmission line for high-frequency signals	a transmission line for high-frequency signals