Each other is the correct spelling (e.g., “They love each other very much”). Eachother (with no space) is incorrect and should be avoided in your writing.

The short answer is that each other (two separate words) is correct.

The correct way to spell the phrase is ‘each other’. It should always be two separate words, not combined into one. This phrase is used when talking about two or more people or things affecting or relating to one another. A common mistake is writing it as ‘eachother’, but this is incorrect in English.

Remember that “other’s” is the correct singular plural form of the base form “other.” “Each other’s” is the correct form we use to refer to one. To remember the form to use, simply remember the inclusion of “each” means it is singular. Making “other’s correct. Here is a simple trick to remember apostrophe rules: