Partner - Vine's Expository Dictionary of New Testament Words
Partner[ 1,,G2844, koinonos ]
an adjective, signifying having in common" (koinos), is used as a noun, "partners" in Luke 5:10, "partner" in 2 Corinthians 8:23; Philemon 1:17 (in spiritual life and business). See COMMUNION, B, COMPANION, No. 2, PARTAKER.
[ 2,,G3353, metochos ]
an adjective, signifying "having with, sharing," is used as a noun, "partners" in Luke 5:7. See FELLOW, PARTAKER.
Note: Koinonos stresses the fact of having something in common, metochos, "the fact of sharing;" the latter is less thorough in effect than the former.