commercial vs commercial-grade

commercial is a noun but commercial-grade is not a noun.

Word	Noun	Adjective	Verb	Adverb
commercial	Yes	Yes	No	No
commercial-grade	No	Yes	No	No

As adjectives, commercial and commercial-grade are synonyms defined as:

commercial and commercial-grade: of the kind or quality used in commerce; average or inferior

commercial (noun)	commercial-grade (noun)
a commercially sponsored ad on radio or television

commercial (adjective)	commercial-grade (adjective)
connected with or engaged in or sponsored by or used in commerce or commercial enterprises	of the kind or quality used in commerce; average or inferior
of or relating to commercialism
of the kind or quality used in commerce; average or inferior
profit oriented