Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun hydra

4 senses of hydra

Sense 1
Hydra -- ((Greek mythology) monster with nine heads; when struck off each head was replaced by two new ones; "Hydra was slain by Hercules")
       => mythical monster, mythical creature -- (a monster renowned in folklore and myth)

Sense 2
Hydra, Snake -- (a long faint constellation in the southern hemisphere near the equator stretching between Virgo and Cancer)
       INSTANCE OF=> constellation -- (a configuration of stars as seen from the earth)

Sense 3
hydra -- (trouble that cannot be overcome by a single effort because of its many aspects or its persistent and pervasive quality; "we may be facing a hydra that defies any easy solution")
       => trouble, problem -- (a source of difficulty; "one trouble after another delayed the job"; "what's the problem?")

Sense 4
hydra -- (small tubular solitary freshwater hydrozoan polyp)
       => hydrozoan, hydroid -- (colonial coelenterates having the polyp phase dominant)