"Tenterhook" is a phrase that describes a state of anticipation or anxiety. Synonyms for the word include the phrase "on edge," implying that something is causing a sense of unease or excitement. Other synonyms include "anxious," "nervous," "restless," and "apprehensive." These words all suggest some sort of concern or worry, whether it be about an upcoming event or an uncertain situation. Other variations of the phrase "on tenterhooks" might include "on pins and needles," "in suspense," or "in a state of limbo." Ultimately, each of these phrases signals a state of heightened awareness and heightened emotions towards a particular event or situation.