Antonyms for stagnant

motionless, dirty:

active, spirited, energetic, lively, alert, mobile, working, moving, busy.

noun:

dynamical, running, dynamic.

Paraphrases for Stagnant:

• Adjective :
  constant, dead, deadlocked, depressed, dirty, filthy, fixed, flagging, flat, frozen, gloomy, intact, paralysed, paralyzed, permanent, rigid, slack, sluggish, stabilised, stable, Stagnating, standing, static, stationary, steady, steady-state, still, stumbling, unaffected, unaltered, unchanged, unchanging, weak.