Inquilinism is an interesting ecological phenomenon where one species lives within or on another but does not harm it. It is also referred to as commensalism or phoresy. Commensalism refers to the relationship where one species benefits from the interaction while the other remains neutral, while phoresy is when one organism uses another for transportation. These synonyms help to explain different aspects of inquilinism and highlight the mutualistic nature of the relationship between the species involved. The study of inquilinism has important implications for conservation efforts and understanding the different ways in which species interact in their ecosystems.