Draco vs. Hydra — What's the Difference?

A constellation in the polar region of the Northern Hemisphere near Cepheus and Ursa Major. Also called Dragon.

Greek Mythology The many-headed monster that was slain by Hercules.

The Dragon, a northern constellation within which is the north pole of the ecliptic.

(Astronomy)A satellite of Pluto.

A luminous exhalation from marshy grounds.

A constellation in the equatorial region of the southern sky near Cancer, Libra, and Centaurus. Also called Snake2.

A genus of lizards. See Dragon, 6.

A persistent or multifaceted problem that cannot be eradicated by a single effort.

Athenian lawmaker whose code of laws prescribed death for almost every offense (circa 7th century BC)

Any of several small solitary freshwater hydrozoans of the genus Hydra and related genera, having a cylindrical body and a mouth surrounded by tentacles.

A faint constellation twisting around the north celestial pole and lying between Ursa Major and Cepheus

Any of several small freshwater polyps of the genus Hydra and related genera, having a naked cylindrical body and an oral opening surrounded by tentacles.

Flying dagons

(fantasy) A dragon-like creature with many heads and the ability to regrow them when maimed.

A complex, multifarious problem or situation that cannot be solved easily and rapidly.

A serpent or monster in the lake or marsh of Lerna, in the Peloponnesus, represented as having many heads, one of which, when cut off, was immediately succeeded by two others, unless the wound was cauterized. It was slain by Hercules. Hence, a terrible monster.

Hence: A multifarious evil, or an evil having many sources; not to be overcome by a single effort.

Any small fresh-water hydroid of the genus Hydra, usually found attached to sticks, stones, etc., by a basal sucker.

A southern constellation of great length lying southerly from Cancer, Leo, and Virgo.

(Greek mythology) monster with nine heads; when struck off each head was replaced by two new ones;

A long faint constellation in the southern hemisphere near the equator stretching between Virgo and Cancer

Trouble that cannot be overcome by a single effort because of its many aspects or its persistent and pervasive quality;

Small tubular solitary freshwater hydrozoan polyp