This document discusses different types of word formation processes: blending, clipping, compounding, borrowing, and acronyms. Blending involves combining two words to form a new term, like "smog." Clipping is shortening words in casual speech, like "fax." Compounding joins words, like "doorknob." Borrowing incorporates words from other languages for necessity or prestige. Acronyms form new words from the initial letters of phrases, pronounced as individual letters or as words.