The phrase "hum haw" refers to the act of hesitating or stalling when trying to make a decision or answer a question. There are several words that could be used as synonyms for this phrase, including dither, waver, vacillate, and procrastinate. These words all convey the sense of uncertainty or indecision that is often associated with "hum hawing." Other synonyms could include equivocate or beat around the bush, as these phrases suggest a lack of clarity or directness in one's communication. Ultimately, whether one uses "hum haw" or another synonym, the important thing is to recognize when we are struggling to make a decision, and take steps to move forward and make a choice.