Strong's G477 — ἀντίθεσις (noun)
antithesis (an-tith'-es-is) n.
1. opposition, i.e. a conflict (of theories)
[from a compound of G473 and G5087]
KJV: opposition 
Root(s): G473, G5087 
Hebrew root: τίθημι
Occurrences: 1