Is schoolteacher one word or two?

As a student recently revising an academic essay discussing the evolution of educational roles, I noticed variations in how people refer to a teacher at a primary or secondary school. Specifically, I’m unsure whether “schoolteacher” should be written as one compound word or kept as two separate words—either “school teacher” or hyphenated. This confusion arose after seeing inconsistent uses in reputable publications and style guides. Could you clarify which form is grammatically correct and currently preferred in modern English, especially in formal writing?”Schoolteacher” is generally considered one word. It is a compound noun formed by combining “school” and “teacher” without a space or hyphen. This spelling is standard in American English dictionaries and commonly used in written and spoken contexts. While some style guides or regional variations might use “school teacher” (two words) occasionally, especially in British English, the one-word form remains the predominant and more accepted spelling in contemporary usage. The one-word version also appears in major references such as the Merriam-Webster Dictionary and the Oxford English Dictionary.