coax cable vs coaxial cable

coax cable and coaxial cable both are nouns.

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

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

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

Other synonyms of coax cable include coax.

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