footer vs notation

footer and notation both are nouns.

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

As nouns, notation is a hypernym of footer; that is, notation is a word with a broader meaning than footer:

Other hypernyms of footer include annotation, note.

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