Mc vs megahertz

Mc and megahertz both are nouns.

Word	Noun	Adjective	Verb	Adverb
Mc	Yes	No	No	No
megahertz	Yes	No	No	No

As nouns, Mc and megahertz are synonyms defined as:

Other synonyms of Mc include megacycle, megacycle per second, MHz.

Mc (noun)	megahertz (noun)
one million periods per second	one million periods per second