one another vs each other

one another pronoun

: each of two or more people, animals, etc., who are doing something together or in relationship to the other or others in the group 

▪ We shared our thoughts with one another. [=each other]

each other pronoun

: each of two or more people, animals, etc., who are doing something together or in relationship to the other or others in the group 

▪ My brother and I looked at each other. [=we looked at one another;

 he looked at me and I looked at him] 


▪ The twins can wear each other's clothes. [=each one can wear the other's clothes]

made for each other