supplement
noun
• a thing added to something else in order to complete or enhance it.
• "the handout is a supplement to the official manual"
Similar:
addition,
supplementation,
additive,
extra,
companion,
add-on,
accessory,
adjunct,
appendage,
appurtenance,
appendix,
addendum,
end matter,
tailpiece,
codicil,
rider,
postscript,
extension,
coda,
sequel,
• the amount by which an angle is less than 180°.
supplement
verb
• add an extra element or amount to.
• "I looked for a part-time job to supplement my income"
Similar:
augment,
increase,
add to,
boost,
swell,
amplify,
enlarge,
make larger/bigger/greater,
complement,
round off,
complete,
widen,
broaden,
expand,
top up,
Origin:
late Middle English: from Latin supplementum, from supplere ‘fill up, complete’ (see supply1).
