supplement vs back matter

supplement and back matter both are nouns.

Word	Noun	Adjective	Verb	Adverb
supplement	Yes	No	Yes	No
back matter	Yes	No	No	No

supplement (noun)	back matter (noun)
a supplementary component that improves capability	written matter following the main text of a book
a quantity added (e.g. to make up for a deficiency)
textual matter that is added onto a publication; usually at the end

supplement (verb)	back matter (verb)
add to the very end
add as a supplement to what seems insufficient
serve as a supplement to