Collocations with CATCH Collocations Collocations are used to express two or more words that are frequently used together in a single sentence or paragraph. It is often that when you substitute one of these words in a collocation with a comparable one, the resulting expression will sound weird, even though its meaning is technically the same. For example “do a favor” essentially means the same as “make a favor” but the second one sounds off. Collocations can be used to express actions, emotions, and thoughts. Their use in casual conversation is both formal and informal; other varieties of English, such