firmware vs microcode

firmware and microcode both are nouns.

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

As nouns, firmware and microcode are synonyms defined as:

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

firmware (noun)	microcode (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