1: βοηθός
(Strong's #998 — Adjective — boethos — bo-ay-thos' )

an adjective, akin to A, No. 2, and B, No. 4, under HELP, signifying "helping," is used as a noun in Hebrews 13:6 , of God as the helper of His saints.

2: συνεργός
(Strong's #4904 — Adjective — sunergos — soon-er-gos' )

an adjective, akin to B, No. 7, under HELP, "a fellow worker," is translated "helper" in the AV of Romans 16:3,9 , RV, "fellow worker;" in 2—Corinthians 1:24 , AV and RV, "helper;" in 2—Corinthians 8:23 , AV, "fellow helper," RV, "fellow worker;" so the plural in 3—John 1:8 : See CAMPANION, LABORER , etc.