megabyte vs MB

megabyte and MB both are nouns.

Word	Noun	Adjective	Verb	Adverb
megabyte	Yes	No	No	No
MB	Yes	No	No	No

As nouns, megabyte and MB are synonyms defined as:

megabyte and MB: a unit of information equal to 1024 kibibytes or 2^20 (1,048,576) bytes

Other synonyms of megabyte include M, mebibyte, MiB.

As nouns, megabyte and MB are synonyms defined as:

megabyte and MB: a unit of information equal to 1000 kilobytes or 10^6 (1,000,000) bytes

Other synonyms of megabyte include M.

megabyte (noun)	MB (noun)
a unit of information equal to 1024 kibibytes or 2^20 (1,048,576) bytes	(a British degree) a bachelor's degree in medicine
a unit of information equal to 1000 kilobytes or 10^6 (1,000,000) bytes	a unit of information equal to 1024 kibibytes or 2^20 (1,048,576) bytes
	a unit of information equal to 1000 kilobytes or 10^6 (1,000,000) bytes