Strong's G2205 — ζῆλος (noun)
zelos (dzay`-los) n.
1. (properly) heat
2. (figuratively) "zeal"
3. (favorably) ardor
4. (unfavorably, of a husband) jealousy (also used of God)
5. (of an enemy) malice
[from G2204]
KJV: emulation, envy(-ing), fervent mind, indignation, jealousy, zeal 
Root(s): G2204 
Hebrew root: ζέω
Occurrences: 16