Strong's #240: allelon (pronounced al-lay'-lone)
Genitive plural from 243 reduplicated; one another:--each other, mutual, one another, (the other), (them-, your-)selves, (selves) together (sometimes with 3326 or 4314).
Thayer's Greek Lexicon:
̓́
allēlōn
1) one another, reciprocally, mutually
Part of Speech: pronoun plural reciprocal
Relation: gen. plural from G243 reduplicated
Usage:
This word is used 101 times:
Revelation 11:10: "and shall send gifts one to another; because these two prophets"