17 possible answers to
Answers with 4 characters: ATIP WARN Answers with 5 characters: ALIVE AWAKE AWARE READY Answers with 6 characters: TIPOFF Answers with 7 characters: HEADSUP QUIVIVE REDFLAG WAKEFUL Answers with 8 characters: ONTIPTOE OPENEYED Answers with 9 characters: ONTHEBALL OPENEARED WIDEAWAKE Answers with 10 characters: ONONESTOES