Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun alertness

3 senses of alertness

Sense 1
watchfulness, wakefulness, vigilance, alertness -- (the process of paying close and continuous attention; "wakefulness, watchfulness, and bellicosity make a good hunter"; "vigilance is especially susceptible to fatigue")
       => attention -- (the faculty or power of mental concentration; "keeping track of all the details requires your complete attention")

Sense 2
alertness, alerting -- (a state of readiness to respond; "alerting was indicated by the desynchronization of the EEG")
       => arousal -- (a state of heightened physiological activity)

Sense 3
alertness, sharp-sightedness, on the qui vive -- (lively attentiveness)
       => attentiveness -- (the trait of being observant and paying attention)