This research investigated three synonymous adjectives "perfect," "flawless," and "impeccable" in terms of meaning, degree of formality, collocations, and grammatical patterns. The three synonymous adjectives were scrutinized through the Corpus of Contemporary American English (COCA). The findings suggested that these three synonymous adjectives share some similarities; however, they cannot be used interchangeably in every context. In hotel contexts, there seemed to be a preference for "impeccable" compared with the other two.