1) Acute 2) Agile 3) Apperceptive 4) Apprehensive 5) Astute 6) Discerning 7) Discriminating 8) Incisive 9) Insightful 10) Keen 11) Knowledgeable 12) Meaningful 13) Observing 14) Penetrating 15) Penetrative 16) Piercing 17) Prophetic 18) Responsive 19) Sapient 20) Shrewd 21) Sympathetic 22) Understanding 1) Astute 2) Aware 3) Discerning 4) Intuitive 5) Keen in discernment 6) Of or relating to perception 7) Sensory activity 8) Shrewd 9) Understanding 
• (a.) Of or pertaining to the act or power of perceiving; having the faculty or power of perceiving; used in perception.
Relating to or having a higher than normal power of perception. ... (05 Mar 2000) ... 
Per·cep'tive adjective [ Confer French perceptif .] Of or pertaining to the act or power of perceiving; having the faculty or power of perceiving; used in perception. 'His perceptive and reflective faculties.' Motley. 
Type: Term Pronunciation: per-sep′tiv Definitions: 1. Relating to or having a higher than normal power of perception.
[adj] - of or relating to perception 2. [adj] - having the ability to perceive or understand
adjective of or relating to perception; `perceptive faculties`
of or relating to awareness via the senses