Synonyms for supplement

Noun

1. addendum, supplement, postscript, matter

usage: textual matter that is added onto a publication; usually at the end

2. supplement, supplementation, increase, increment

usage: a quantity added (e.g. to make up for a deficiency)

3. accessory, appurtenance, supplement, add-on, component, constituent, element

usage: a supplementary component that improves capability

Verb

1. supplement, add

usage: add as a supplement to what seems insufficient; "supplement your diet"

2. supplement, constitute, represent, make up, comprise, be

usage: serve as a supplement to; "Vitamins supplemented his meager diet"

3. append, add on, supplement, affix, attach

usage: add to the very end; "He appended a glossary to his novel where he used an invented language"