seasonal (n.)
seasonal (adj.)
- aestival
- alternate
- arctic
- autumnal
- boreal
- brumal
- canicular
- circling
- cyclic
- epochal
- equinoctial
- even
- hibernal
- hiemal
- intermittent
- isochronal
- measured
- oscillatory
- periodical
- reciprocal
- recurrent
- recurring
- rhythmic
- rotary
- serial
- springlike
- steady
- summery
- undulant
- undulatory
- vernal
- wavelike
- wheeling
- wintery
- wintry
