The phrase "mine by right" refers to something that belongs to someone naturally or lawfully. Some synonyms for this phrase include "my entitlement," "my ownership," "my inheritance," "my birthright," and "my prerogative." These phrases all denote a sense of legitimacy and entitlement, suggesting that the item in question is rightfully owned by the speaker. Other synonyms might include "my possession," "my asset," "my property," and "my claim." Whether referring to land, goods, or intangible assets like intellectual property, the phrase "mine by right" carries a strong implication of legal or moral ownership.