There are many ways in which we, as speakers, are creative in how we form and interpret new words. Working across the interfaces of psychology, linguistics, psycholinguistics, and sociolinguistics, this book presents cutting-edge interdisciplinary research, showing how we manipulate the range of linguistic tools at our disposal to create an infinite range of words and meanings. It provides both a theoretical account of creativity in word-formation and word-interpretation, and an experimental framework with the corresponding results obtained from more than seven hundred participants. Data drawn from this vast range of speakers shows how creativity varies across gender and age, and demonstrates the complexity of relationships between the examined variables. Pioneering in its scope, this volume will pave the way for a brand new area of research in the formation and interpretation of complex words.