advertent (adj.)

• agog
• alert
• assiduous
• attentive
• aware
• careful
• concentrated
• conscious
• diligent
• earnest
• finical
• finicky
• heedful
• intense
• intent
• meticulous
• mindful
• nice
• niggling
• observant
• observing
• open-eyed
• openmouthed
• regardful
• watchful