extra

• A minor actor in crowd scenes (synset 110696008)
  hypernym: actor, histrion, player, role player, thespian - a theatrical performer
  synonym: spear carrier, supernumerary
• An additional edition of a newspaper (usually to report a crisis) (synset 106609702)
  hypernym: edition - an issue of a newspaper
• Something additional of the same kind (synset 103312926)
  hypernym: artefact, artifact - a man-made object taken as a whole
  synonym: duplicate

• Unusually or exceptionally (synset 400085109)

• More than is needed, desired, or required (synset 301585713)
  similar: unnecessary, unneeded - not necessary
  synonym: excess, redundant, spare, supererogatory, superfluous, supernumerary, surplus
• Added to a regular schedule (synset 302375887)
  similar: unscheduled - not scheduled or not on a regular schedule
  synonym: special
• Further or added (synset 300049078)
  similar: additive - characterized or produced by addition
  synonym: additional

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• Rhyme: Dillfrog, RhymeZone
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