fromming abusing a substance black out (verb) pass out: become unconscious, usually
Sinonime: additional,
backup, de trop,
emergency,
free, in excess, in reserve, in store, lagniappe, leftover, more than enough,
odd,
option,
over, supererogatory, superfluous, supernumerary, surplus, unoccupied, unused,
unwantedAntonime: necessary