A revival of interest in morphology has occurred during recent years. The periodical Yearbook of Morphology, published since 1988, has proven to be an eminent support for this upswing of morphological research, and has shown that morphology is central to present-day linguistic theorizing. In the Yearbook of Morphology 2005 a number of important theoretical issues are discussed: the role of inflectional paradigms in morphological analysis, the differences between words and affixes, and the adequacy of competing models of word structure. In addition, the role of phonological factors in shaping complex words is discussed. Evidence for particular positions defended in this volume is taken from a wide variety of languages. This volume is of interest to those working in theoretical, descriptive and historical linguistics, morphologists, phonologists, computational linguists, and psycholinguists.