Based on extensive and diverse material from 70 languages, and covering a range of previously undiscussed problems, this book provides a thorough analysis of how nominalization types interact with other structural features. It focuses on action nominal constructions, and in particular, the comparison of their syntactic structure with that of finite clauses and of other noun phrases, a problem which has claimed much attention in current syntactic theories. Supported by rich empirical material and clearly illustrated with examples from all the sample languages, the book provides a detailed and consistent basis for constructing a typology of derived constructions and for presenting cross-linguistic comparisons.