The paper aims to raise the English teachers’ awareness of the terminological ambiguities and the loose use of several common TEFL words such as “method”, “approach”, “design”, “technique”, “procedure”, “strategy”, “methodology”, and others. The efforts that have been made in an attempt to clarify them are presented in connection with the models proposed by E. M. Antony (1963), W. F. Mackey (1965), J. C. Richards and T. S. Rodgers (1982), H. H. Stern (1983), and B. Kumaravadivelu (2008). The ambiguities and overlaps found in these models are pointed out, and implications for the practitioners’ condition are suggested.