Why does WoW and LoL have different meanings of "snare"?
https://wow.gamepedia.com/Snare
So according to WoW, a snare is a movement imparing effect that slows movement speed. In League, Root and Snares are one in the same. I'll admit I played WoW first, and I always classify slows as snares; and immobilizes as roots. Stuns are the same in both games I think.
I read that in League it's more "flavor text". Zyra "roots" because she's a plant and everyone else "snares", I guess because people hated saying: "Lux's bind rooted me".
