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KEY: Alert.
SYN: Active, brisk, nimble, prepared, prompt, vigilant, ready, wakeful, watchful, on the watch, lively.
ANT: Slow, sleepy, lazy, absent, unready, oblivious, sluggish, inactive, unwatchful, dilatory, drowsy.
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KEY: Alien.
SYN: Foreign, strange, undomesticated, inappropriate, irrelevant, impertinent.
ANT: Pertinent, essential, proper, appropriate, relevant, germane, akin, apropos, naturalized.
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KEY: Alienate.