This article aims at contributing to the description of phenomena related to dynamicity in specialised discourses. Specifically, we analyse denominative variation (with cognitive consequences) in museum studies and museography using Spanish language corpus. We consider units with the morpheme muse(o)- extracted using the tool TermoStat (Drouin 2003). For the analysis, we will use the denominative variation typology by Fernández-Silva (2013), which will allow us: (a) to confirm that the typology is adequate for disciplines other than fishing (for which it was created at the beginning); (b) to find and characterise possible tendencies of variation, in museum studies discourses, which will allow us to orientate subsequent lexicographic decisions related to the relevant information to be explicited.