Topics: Word structure, morphology, Morphemes, morphs, allomorphy, morphological operation, Inflection, derivation, Morphological formatives, morphosyntax, Morphological typology, lexicon, Structuralist theories, Morphophonemics, Phonology, Lexicalism, Lexicalist Grammar, Halle's Prolegomena, Siegel's Level Ordering Hypothesis, Aronoff's Word Formation, Generative Grammar, morphology-phonology interface, SPE model, Natural Generative Phonology, Lexical Phonology, Kiparsky's Alternation Condition, Cyclic Phonology, Lexical Phonology, Zwicky's Shape Conditions, McCarthy's theory, Reduplication, Argument structure, Syntactic affixation, Template morphology, Paradigm Economy, Grammatical relations, Marantz's theory, Affix-mediated alternations, Morphological merger, applied verbs, Baker's incorporation theory, Valency alternations, Williams's theory, adjectival passives, Compounds, Root compounds, Syntactic approaches, Clitics, Cliticization, agreement, Bracketing paradoxes, Sproat's Mapping Principle, paradigmatic word formation, Separation Hypothesis, Autolexical syntax, Post -syntactic compounding, Parallel Morphology