The term "resembling hysteria" can be used to describe a variety of states of mind or emotions. Some synonyms for this phrase might include "hysterical," "frantic," "panicked," "frenzied," "overwrought," "manic," or "hysteroid." Each of these words has a slightly different connotation, but all suggest a state of intense emotion or agitation. For example, "hysterical" implies a lack of control, while "overwrought" suggests a state of excessive tension or anxiety. "Panicked" implies a sudden and extreme fear or anxiety, while "manic" suggests a heightened state of energy or enthusiasm. Ultimately, the choice of synonym will depend on the specific context and nuances of the situation being described.