The term "starvation diet" often refers to a very low-calorie diet that is unhealthy for the body and can lead to malnutrition. Some possible synonyms for this phrase might include "crash diet," "fad diet," or "extreme diet." Other similar phrases might include "yo-yo dieting," "drastic weight loss plan," or "dangerous weight loss method." Essentially, any term that suggests a severely restricted or unsustainable eating plan could be considered a synonym for "starvation diet." It is important to remember that healthy weight loss should be achieved through balanced eating, regular exercise, and other sustainable lifestyle changes, rather than fad dieting or extreme measures.