摘要:AbstractThis paper considers various morphological processes involved in the creation ofpleiosyllables, long words that arise from “superderivation” and co-exist with shorter words with the same sense (which makes them redundant). It also looks at the effect of geographical factors on the distribution and extent of the phenomenon. To address these questions a corpus was used,CORPES XXIfrom the Spanish Royal Academy, since this was the best suited to the aims of the research, as it includes texts from the entire Spanish-speaking world from 2001 down to the present day. Finally, an assessment was made of the extent to which these neologisms are to be found in the Academy's dictionaries, together with the possibilities offered by taking into account the data obtained from the corpus as a means for improving that institution's lexicographical publications.