"Slow to act" is a phrase that typically denotes a lack of urgency or delay in taking action. Synonyms for this term could include phrases such as "lethargic," "sluggish," "unresponsive," "inactive," "deliberate," "considerate," "measured," "methodical," or "cautious." Each of these synonyms carries a slightly different connotation, and choosing the right one depends on the circumstances in which the phrase is being used. For example, "deliberate" and "methodical" might be appropriate when discussing a situation that requires careful planning, while "lethargic" or "sluggish" might better describe a person or organization that demonstrates a general lack of energy or enthusiasm.