Nouns

(n)pyrrhic, dibracha metrical unit with unstressed-unstressed syllables
(n)pyrrhican ancient Greek dance imitating the motions of warfare

Adjectives

(a)pyrrhicof or relating to a war dance of ancient Greece“pyrrhic dance movements”
(a)pyrrhicof or relating to or containing a metrical foot of two unstressed syllables“pyrrhic verses”
(a)pyrrhicof or relating to or resembling Pyrrhus or his exploits (especially his sustaining staggering losses in order to defeat the Romans)“a Pyrrhic victory”