When referring to someone who is expected to inherit a title or property, the term "heir expectant" is commonly used. However, there are several other synonyms that can be used in place of this term. These include "presumptive heir", "heir apparent", "heir designee", "heir presumptive", and "heir-delegate". Each of these alternatives can be used to convey the same meaning as "heir expectant" and can add variety to one's writing or speech. Additionally, using synonyms can help to avoid redundancy and make one's language more engaging and interesting.