TESL, or Teaching English as a Second Language, is a phrase commonly used within the English language teaching community. However, there are several synonyms that can also be used interchangeably such as TESOL (Teaching English to Speakers of Other Languages), TEFL (Teaching English as a Foreign Language), and ELT (English Language Teaching). While these terms share the same broad definition, they are often used to describe different contexts of teaching English. TESOL typically refers to teaching English to non-native speakers in English-speaking countries, while TEFL refers to teaching English to non-native speakers in their home country, and ELT is a more general term that can apply to both contexts.