extra

n.

[1]	supernumerary , spear carrier
[2]	duplicate , addition , addendum , accessory , appurtenance , supplement , bonus , premium , dividend
[3]	supplement , (US) mark-up , surcharge , (Slang) (US/Canadian) kicker
[4]	supernumerary , walk-on , (Colloq) super , spear-carrier

adv.

[1]	uncommonly , unusually , exceptionally , unexpectedly , extraordinarily , remarkably , notably , surprisingly , amazingly , very , particularly , especially , extremely , strikingly
[2]	additionally , again , more , in addition

adj.

[1]	additional , added , auxiliary , accessory , supplementary , supplemental , further , ancillary , subsidiary , collateral , adventitious
[2]	leftover , excess , spare , surplus , unused , superfluous , supernumerary , reserve
[3]	excess , redundant , spare , supererogatory , superfluous , supernumerary , surplus
[4]	special
[5]	additional