additional (adj.)

• accessory
• accidental
• accumulative
• added
• additive
• adscititious
• adventitious
• ancillary
• another
• appurtenant
• auxiliary
• casual
• circumstantial
• collateral
• contingent
• contributory
• cumulative
• extra
• farther
• fortuitous
• fresh
• further
• incidental
• inessential
• more
• new
• nonessential
• other
• plus
• renewed
• secondary
• spare
• subsidiary
• summational
• summative
• superfluous
• supernumerary
• supplemental
• supplementary
• surplus
• ulterior
• unessential