absent × present
accept × decline, refuse
accurate × inaccurate
admit × deny
advantage × disadvantage
agree × disagree
alive × dead
all × none, nothing
always × never
ancient × modern
answer × question
apart × together
appear × disappear, vanish
approve × disapprove
arrive × depart
artificial × natural
ascend × descend
attractive × repulsive
awake × asleep
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