"In a pucker" is an idiom used to describe a state of worry or anxiety. There are various synonyms to describe this particular emotion, such as "in a flap", "in a tizzy", "on edge", or "stressed out". These words are used to describe an individual's heightened state of anxiety and nervousness. Other synonyms include "fidgety", "uneasy", "jittery", and "restless". The phrases "in a sweat", "in a panic", and "in a frenzy" can also be used to describe similar feelings of worry and anxiousness. The use of these synonyms allows for a broader understanding of an individual's emotional state and helps to better convey the depth of their feelings.