- perennial - lasting three seasons or more; "the common buttercup is a popular perennial plant"
Antonyms: annual, one-year, biennial, two-year
- perennial - lasting an indefinitely long time; suggesting self-renewal; "perennial happiness"
Antonym: short (indirect, via long)
- perennial, recurrent, repeated - recurring again and again; "perennial efforts to stipulate the requirements"
Antonym: sporadic (indirect, via continual)