Dictionary.com Thesaurus.com

jackal vs. hyena

jackal

[jak-uhl, -awl] / ˈdʒæk əl, -ɔl /

noun

any of several nocturnal wild dogs of the genus Canis, especially C. aureus, of Asia and Africa, that scavenge or hunt in packs.
a person who performs dishonest or base deeds as the follower or accomplice of another.
a person who performs menial or degrading tasks for another.

hyena

[hahy-ee-nuh] / haɪˈi nə /

Or hyaena

noun

a doglike carnivore of the family Hyaenidae, of Africa, southwestern Asia, and south central Asia, having a coarse coat, a sloping back, and large teeth and feeding chiefly on carrion, often in packs.