Synonyms of footnote
annotationAn annotation is a note that is added to a text or diagram, often in order to explain it.
• He supplied annotations to 15,000 musical works.
• A gloss in the margin explains this unfamiliar word.
noteIn a book or article, a note is a short piece of additional information.
• See note 16 on page 223.
Thesaurus for footnote from the Collins English Thesaurus