When looking for synonyms for the phrase "in act of," some options include "in the process of," "engaged in," "carrying out," "performing," "executing," "undertaking," "doing," and "pursuing." These alternatives can be useful in varying contexts, such as describing an ongoing action or a work in progress. For instance, someone may be in the process of renovating their home, in act of creating a new business, or in act of planning a trip. There are also instances where using a different phrase can add nuance or emphasis to the description, such as "on the verge of," "on the cusp of," or "nearing completion." Choosing the right synonym can help convey a clearer understanding of the situation at hand.