footer vs linear measure

footer and linear measure both are nouns.

Word	Noun	Adjective	Verb	Adverb
footer	Yes	No	No	No
linear measure	Yes	No	No	No

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

footer: (used only in combinations) the height or length of something in feet
linear measure: a unit of measurement of length

Other hypernyms of footer include linear unit.

footer (noun)	linear measure (noun)
a printed note placed below the text on a printed page	a unit of measurement of length
a person who travels by foot
(used only in combinations) the height or length of something in feet