A word formation trainer for Spanish Year 13 (2.º de Bachillerato) students preparing for the PAU university entrance exam: simple, derived, compound (juxtaposition, hyphenated, disjunction and synapsis), parasynthetic words, initialisms and acronyms, using real exam words from the CIUG (Galicia) and other regions. It includes graded mock exams, a review of mistakes, a guide based on the RAE criteria and an AI analyser that breaks any word down into its morphemes.