microcode vs firmware

microcode and firmware both are nouns.

Word	Noun	Adjective	Verb	Adverb
microcode	Yes	No	No	No
firmware	Yes	No	No	No

As nouns, microcode and firmware are synonyms defined as:

microcode and firmware: (computer science) coded instructions that are stored permanently in read-only memory

microcode (noun)	firmware (noun)
(computer science) coded instructions that are stored permanently in read-only memory	(computer science) coded instructions that are stored permanently in read-only memory