"Phew!" is often uttered to express a sense of relief or exhaustion. The word is commonly used when someone has completed a difficult task or has narrowly avoided a danger. However, there are several other words and expressions that can be used instead of "phew!" to convey similar emotions. These include "whew," "thank goodness," "that was close," "I'm so glad," and "what a relief." Each alternative adds their own unique connotation to the expression that can be used in varying contexts. Ultimately, these synonyms effectively communicate a sense of relief and help to express emotions that cannot be easily put into words.