SLEEPER CELL Antonyms There are 6 antonyms of the phrase sleeper cell. (opposite meanings)Did you mean?Definition of SLEEPER CELLAlso try opposite words for..cellsleepsleeperBest Opposite Words For SLEEPER CELLTop 20Top 10 Top 20 (Default)Top 50 Top 100 All All (Default)WordsPhrases All All (Default)Verb Noun Adjective Adverb RankWordSave?Synonyms..UsageType1activeadjectiveadj2alertverb, nounv, n3awakeverb, adjectivev, adj4consciousadjectiveadj5vigilantadjectiveadj6watchfuladjectiveadj Alternatives for ACTIVE Words (27)agilebusyenergeticnimblealivedynamicanimatedbriskbustlingengagedfastindustriouslivelypromptquickspiritedvibrantvigorousactingdiligentoperativetopworkingdeedfulcombat-readyfightingparticipatingPhrases (3)in forceactive agentactive voiceOpposite words for active Alternatives for ALERT Words (22)watchfulattentiveawarekeenobservantpromptquickresponsivesharpvigilantalarmalarumalertingaliveawakebrisklivelymerryrattlingsnappyspankingzippyPhrases (2)qui vivewarning signalOpposite words for alert Alternatives for AWAKE Words (15)consciousalertawakeawakenedwakefulwide-awakeawakencrylucidwarywokealivearousewakewakenPhrases (3)wake upbring roundcome aliveOpposite words for awake Alternatives for CONSCIOUS Words (13)acquaintedalertawarecognizantconsciousinformedknowledgeablemindfulperceptivesentientwiseapprisedwittingOpposite words for conscious Alternatives for VIGILANT Words (12)watchfulalertobservantattentivecarefulcautiousargus-eyedawarecircumspectopen-eyedwakefulwaryPhrases (1)on the qui viveOpposite words for vigilant Alternatives for WATCHFUL Words (7)alertargus-eyedinsomniacopen-eyedsleeplessvigilantwakefulOpposite words for watchful