Have a little fun with antonyms using this web-based, no-prep, no-print Boom™ Card deck. Thirty pairs of antonyms are included in the deck. This is level 5 (of 5) and includes the following concepts: divide/multiply entrance/exit uncle/aunt verticle/horizontal compliment/insult attic/cellar simple/complicated valley/mountain damage/repair comedy/drama plant/harvest forbid/allow singular/plural vacant/occupied yesterday/tomorrow modern/ancient refuse/accept captive/free comfortable/uncomfortable