Preëmptioner is a rare word that means a person who has the right of preemption or the ability to purchase something before others. Although there are not many direct synonyms for this term, there are several words that can describe a similar concept. One of these words is "priority buyer," which refers to someone who is given precedence when purchasing a product or service. Another option is "first dibs," which implies the first chance or opportunity to buy. An additional synonym could be "privileged purchaser," which suggests a person who has an advantage over others when buying something. Overall, while preëmptioner may be a unique term, there are ways to express a similar concept through different words.