Mythology: Who is the greek equivalent of the roman god Discordia ?

Questions

what poker hand comprises of a three of a kind and a pair?

what do you call the playing pieces in dominoes?

Which story is narrated by Ishmael?

What was the name given to the anti-communist hysteria in America from 1947 - 1954?

Which pop stars first major screen role was as an alien called Thomas Jerome Newton?