perceptive (adj.)
- acute
- alert
- alive
- all-knowing
- apperceptive
- apprehensive
- astute
- attentive
- aware
- cogent
- cognizant
- comprehending
- conscious
- discerning
- farseeing
- farsighted
- foresighted
- forethoughtful
- gnostic
- impressible
- impressionable
- impressive
- incisive
- insightful
- intelligent
- judicious
- keen
- knowing
- knowledgeable
- longsighted
- mindful
- observant
- omniscient
- penetrating
- percipient
- perspicacious
- perspicuous
- piercing
- prehensile
- prehensive
- provident
- quick
- quick-witted
- receptive
- responsive
- sagacious
- sage
- sensible
- sensitive
- sentient
- sharp
- shrewd
- sophic
- susceptible
- trenchant
- understanding
- wise