All for is a common idiomatic expression that implies a strong sense of support and enthusiasm for something. Some synonyms for all for include totally supportive, strongly in favor of, fully behind, in alignment with, in agreement with, wholeheartedly behind, and entirely sympathetic. These phrases can be used in a variety of contexts such as sports, politics, and personal relationships. Whether it's cheering for a favorite team, endorsing a political candidate, or encouraging a friend, using synonyms for all for can help convey a sense of passion and dedication towards a cause or individual.