"Star boarder" is a term that is often used to describe a student who is considered the best resident in a boarding house or dormitory. Synonyms for this phrase could include "head boarder," "top resident," or "premier lodger." Other possibilities could be "prime boarder," "excellent tenant," or "chief occupant." These synonyms can be used interchangeably with "star boarder" to indicate the student who stands out amongst all others in their shared living space. Regardless of the specific term used, the implication is that the individual in question is highly respected and admired by their peers and superiors alike.