"Half and half" is a phrase that generally refers to a combination of two items in equal parts. However, there are a number of synonyms that can be used to describe this same concept. Some examples include "50-50 blend," "equal parts," "even split," "halfsies," "split down the middle," and "half and half mixture." Additionally, there are related phrases that can be used, including "equal share," "split evenly," and "divided in half." Depending on the context and tone of the conversation, different synonyms may be more appropriate. However, all of these phrases convey the same basic idea of dividing something equally between two parties.