english
1
general::
noun ADJ. little There was no money left over for luxuries or little extras. | optional | hidden £400 is a lot to pay for a weekend break, but there are no hidden extras. | added Regular guests also get added extras like free room service. EXTRA + VERB include sth Optional extras include anti-lock brakes and an electric sunroof.
Oxford Collocations Dictionary
2
general::
adj.
additional:
I would like some extra food.
noun
additional:
The auto is extra.
Simple Definitions
3
general::
extra
in addition to the usual or standard cost, time, amount etc:
• They let the kids stay up an extra hour. • Some stores charge extra for delivery. • Postage is extra.
additional
[ only before noun ] more than the basic amount or the amount that you expected or agreed. Additional is more formal than extra:
• An evening job would provide additional income. • There may be an additonal charge for paying bills by credit card.
added
[ only before noun ] extra – used when talking about something that makes something better or more effective:
• an added benefit • an added precaution • It was a beautiful place, and the good weather was an added bonus . • Use a sunscreen for added protection.
spare
[ only before noun ] kept in addition to the one you usually use, so that it is available if the one you usually use breaks, gets lost etc:
• a spare key • a spare tyre • a spare set of clothes
Longman-Thesaurus