The phrase "not enough cover" implies that there is insufficient protection or concealment. Some synonyms for this phrase could include "inadequate shelter," "limited protection," "insufficient clothing," "exposed vulnerability," or "lack of concealment." These synonyms play with slight variations of the same idea - the sense of being vulnerable, visible or at risk due to the lack of cover or protection. When seeking to find alternatives phrasing to explain the insufficient coverage, it is important to keep in mind the context to find the best and most fitting synonyms.