The phrase "dares not" can be interchanged with several synonyms to express a similar sentiment. Some of these synonyms include "is afraid to," "hesitates to," "shies away from," "shrinks from," "wavers at," "shies off," "backs down," and "hesitates at." Each of these synonyms conveys a sense of fear or caution in approaching a particular situation or action. Sometimes, choosing an appropriate synonym can help to enhance the overall tone of a piece of writing or add a touch of nuance to a conversation. It is also important to note that using synonyms can help to avoid repetition and keep language fresh and engaging.