each other vs. one another

The reciprocal pronouns "each other" and "one another" are used to show that people do the same thing, feel the same way, or have the same relationship.

Use each other when there are only two people or things, and one another when there are more than two.

• The two companies are in competition with each other.
• Sarah and Sam have had a big argument and now they're not speaking to each other.
• Emily and Neal looked at each other.
• I and my best friend talk to each other every day.
• Rose and Gina never liked each other.
• We sent New Year cards to one another.
• The triplets dislike one another.
• The dog, cat and bird looked at one another.
• Apes spend a great deal of time grooming one another's fur.