notation vs footer

notation and footer both are nouns.

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

As nouns, footer is a hyponym of notation; that is, footer is a word with a more specific, narrower meaning than notation:

notation (noun)	footer (noun)
the activity of representing something by a special system of marks or characters	a printed note placed below the text on a printed page
a technical system of symbols used to represent special things	a person who travels by foot
a comment or instruction (usually added)	(used only in combinations) the height or length of something in feet