General:
* Focus
* Concentration
* Notice
* Regard
* Consideration
* Awareness
* Mindfulness
* Heed
* Observation
More specific:
* Focus: This emphasizes the act of concentrating on something specific.
* Notice: This implies becoming aware of something.
* Regard: This suggests a more thoughtful and deliberate focus.
* Consideration: This emphasizes the act of thinking about something carefully.
* Awareness: This implies a general sense of being conscious of something.
* Mindfulness: This suggests a state of being present and attentive.
* Heed: This implies paying close attention to a warning or instruction.
The best synonym to use will depend on the specific meaning you want to convey.