Eleven, Eleventh - Vine's Expository Dictionary of New Testament Words
Eleven, Eleventh[ 1,,G1733, hendeka ]
lit., one ten" (lat., undecim), is used only of the eleven Apostles remaining after the death of Judas Iscariot, Matthew 28:16; Mark 16:14; Luke 24:9, Luke 24:33; Acts 1:26; Acts 2:14.
[ 2,,G1734, hendekatos ]
an adjective derived from the above, is found in Matthew 20:6, Matthew 20:9; Revelation 21:20.