... accidental gaps such as defective paradigms, phonological irregularity (accentuation of Russian nouns) and idiosyncratic meaning. From a computational point of view,' a morpheme-based ... just a particular set of grammatical features such as category, gender, number, person, case, etc. A lexeme contains all the information shared by all the flectional forms of a given lexical ... whereas the actual words are the those potential words that are realized in this language. To give an example, both arrival and arrivation are potential English words, but only the second happens...