footnote vs writing

footnote and writing both are nouns.

Word	Noun	Adjective	Verb	Adverb
footnote	Yes	No	Yes	No
writing	Yes	No	No	No

footnote (noun)	writing (noun)
a printed note placed below the text on a printed page	the activity of putting something in written form
	the act of creating written works
	the work of a writer; anything expressed in letters of the alphabet (especially when considered from the point of view of style and effect)
	letters or symbols that are written or imprinted on a surface to represent the sounds or words of a language
	(usually plural) the collected work of an author

footnote (verb)	writing (verb)
add explanatory notes to or supply with critical comments