This paper aims to research a special phenomenon of mutual perception, i.e. the phenomenon of synaesthesia; taking into consideration the fact that synaesthesia is observed not only as neurological but also as lexical phenomenon. What is more, the study of synaesthesia from the linguistic viewpoint was central and the most significant part of this paper. The representation of findings in the neurological perspective of synaesthesia was based on the research of American neurologist R. Cytowic. The findings which were discovered owing to the research was indeed of a great help in conclusions that need to be made regarding synaesthesia as a linguistic phenomenon. Namely, in order to seriously and convincingly explicate the lexical synaesthesia, one must thoroughly describe and conduct a research regarding its neurological basis. In the observation of synaesthesia as a linguistic mechanism we mainly focused on the research of linguist S. Day and lexicologist R. Dragičević. Their works had to do with the analysis of transfer of synaesthesia in English, German and Serbian languages owing to the fact they represent both solid theoretical and methodological foundation to this paper. After gathering the linguistic corpus for the analysis of lexical synaesthesia in the Croatian language, we made a scale regarding the transfers of synaesthesia. The scale is the following one: hearing → sight → taste → smell → touch. The scale for the Croatian language greatly coincides with the scales for English, German and Serbian languages. The greatest coincidence is visible in the domains of hearing and touch, the first and the last domain on the scales of the four languages. The reason for the similarities in the languages can be found in the sphere of neurology, i.e. in the interconnection between neocortex and lymphatic system, and the speakers’ belonging to the languages that were analyzed in the similar cultural and civilizational circles, as well as in the typological similarities between the language. Insignificant differences within the scales are primarily the reflection of cultural differences and social changes, and they are not significant enough to reject the hypothesis about the universality of synaesthesia in the European languages.