Synonyms:
- advertent,
- agog,
- alert,
- all ears,
- all eyes,
- apt,
- assiduous,
- attentive,
- aware,
- careful,
- concentrated,
- conscious,
- decisive,
- diligent,
- earnest,
- expeditious,
- finical,
- finicking,
- finicky,
- heedful,
- immediate,
- instant,
- instantaneous,
- intense,
- intent,
- intentive,
- meticulous,
- mindful,
- nice,
- niggling,
- observant,
- observing,
- on the ball,
- on the job,
- open-eared,
- open-eyed,
- openmouthed,
- prompt,
- punctual,
- quick,
- ready,
- regardful,
- speedy,
- summary,
- swift,
- watchful