The discourse of promotional tourism employs a rich array of adjectives. However, to date, there exists a dearth of comprehensive studies exploring the usage and characteristics of hyphenated adjectives within promotional tourism discourse. This paper focuses on the lexical examination of such adjectives and elucidates their persuasive role as interpersonal markers that shape the author's voice/stance within the metadiscourse framework. Two main objectives are pursued: (1) to determine the keyness of hyphenated adjectives within the study corpus (PROMTOUR) in comparison to their occurrence in the enTenTen20 reference corpus, and (2) to identify and classify morphological patterns and clusters associated with hyphenated adjectives. A specialized corpus comprising over 760,000 words from 33 original English promotional tourism websites is analyzed using Sketch Engine. The findings indicate that hyphenated adjectives account for approximately 30% of the adjectival lemmas, displaying a remarkably high occurrence in PROMTOUR. Consequently, these adjectives emerge as a pivotal lexical characteristic employed by the authors to fulfil readers' expectations within this particular genre. Furthermore, qualitative analyses reveal the recurrent occurrence of specific morphological patterns, notably those involving past and present participles. The implications of the study for the teaching of tourism English and translation are also discussed.