horde (n.) Look up horde at Dictionary.com
1550s, "tribe of Asiatic nomads living in tents," from West Turkic (compare Tatar urda "horde," Turkish ordu "camp, army"), borrowed into English via Polish, French, or Spanish. OED says the initial -h- seems to have been acquired in Polish. Transferred sense of "any uncivilized gang" is from 1610s. Related: Hordes.
horde (v.) Look up horde at Dictionary.com
"to live or gather in hordes," 1821, from horde (n.). Related: Horded; hording.