horde
CROWD implies a close gathering and pressing together.
e.g. a crowd gathered
e.g. a throng of reporters
e.g. a horde of shoppers
CRUSH emphasizes the compactness of the group, the difficulty of individual movement, and the attendant discomfort.
e.g. a crush of fans
MOB implies a disorderly crowd with the potential for violence.
e.g. an angry mob
noun
｟時に非難して｠ (騒がしい人々の)大集団, 群衆; (動物などの)群れ; (物などの)多数
e.g. he was surrounded by a horde of tormenting relatives.
e.g. Tartar hordes.
ORIGIN
mid 16th century (originally denoting a tribe or troop of Tartar or other nomads): from Polish horda, from Turkish ordu ‘(royal) camp’.
USAGE
>The words hoard and horde have some similarities in meaning and are pronounced the same, so it is unsurprising that they are sometimes confused. A hoard is ‘a secret stock or store of something,’ as in a hoard of treasure, while a horde is a disparaging word for ‘a large group of people,’ as in hordes of fans descended on the stage. Instances of hoard being used instead of horde are not uncommon: around a quarter of citations for hoard in the Oxford English Corpus are for the incorrect use.