An adjective and adverb signifying something additional, beyond what is usual, expected, or needed. It can relate to quantity, quality, or degree. As an adjective, it describes something supplementary. As an adverb, it modifies a verb, adjective, or another adverb, emphasizing the increase or excess. The meaning can also denote importance or someone who is not a leading participant. This versatility makes 'extra' a common and adaptable word. .
PERK MORE PLUS
SPARE BONUS ADDED SUPER ADDON
TOSPARE AMENITY OVERAGE SURPLUS
ADDITIONAL
SUPPLEMENTARY