Definition:
Footnote→ a note of reference, explanation, or comment usually placed below the text on a printed page
Endnote→ a note placed at the end of the text
Informal:
Footnote→ A footnote is when there is a informing sentence put at the end of a page
Endnote→ An endnote is when there is a note or a small sentence placed at the end of a book or text
Etymology:
Footnote→ “1841, from foot (n.) "lower end of a document" (1660s) + note (n.). So called from its original position at the foot of a page.”
Online Etymology Dictionary. www.etymonline.com/word/footnote#:~:text=footnote%20(n.),the%20foot%20of%20a%20page. Accessed 27 Dec. 2021.
Endnote→ end (0lde English) + note (old French)