Difference between Xi and Eleven

Xi

Part of speech: noun

Definition: The name for the 14th letter of Classical and Modern Greek. The 15th in Ancient and Old Greek. Either of a pair of hyperons having spin 1/2, which decay into a lambda particle and a pion.

Eleven

Part of speech: noun

Definition: A cricket team of eleven players.A football team of eleven players.

Part of speech: numeral

Definition: The cardinal number occurring after ten and before twelve. Ordinal: eleventh.

Example sentence: Hot Lips changed a lot in eleven years. Initially, Margaret Houlihan behaved as though a man were the only thing that could complete her life, and she didn't see what richness her life contained. She gained a lot of self-esteem through the years, and she came to realize that what she did, what she offered, was valuable.