Kenneth G. Wilson (1923). The Columbia Guide to Standard American English. 1993.
hoard (n., v.), horde (n.)
Of these homophones, the noun hoard refers to a hidden collection of treasure or supplies, and the verb hoard means to collect and hide away such a reserve of money or things. The noun horde means a wandering or nomadic tribe and more generally now any mob or large group of people, especially one in motion. The term is pejorative: a horde of this sort is probably dangerous.