The document discusses key concepts in morphology and syntax. Morphology is the study of word structure and morphemes, which are the smallest units of meaning. There are different types of morphemes and allomorphs, which are alternative forms of morphemes. Word formation processes include derivation, compounding, blending, clipping, coinage, borrowing, acronyms, backformation, and conversion. Syntax is the study of sentence structure and includes elements such as subjects, verbs, adjectives, interjections, adverbs, pronouns, and conjunctions.