notation vs annotation

notation and annotation both are nouns.

Word	Noun	Adjective	Verb	Adverb
notation	Yes	No	No	No
annotation	Yes	No	No	No

As nouns, notation and annotation are synonyms defined as:

Other synonyms of notation include note.

notation (noun)	annotation (noun)
the activity of representing something by a special system of marks or characters	the act of adding notes
a technical system of symbols used to represent special things	a comment or instruction (usually added)
a comment or instruction (usually added)