Hibernal

1 clue
Estival's opposite
Similar answers:
Albuquerquejournal
Asternal
Avernal
Broadjournalism
Carnal
Carnalknowledge
Carnally
Diurnal
Dreamjournal
Drugparaphernalia
Earnaliving
Eternal
Eternalcircle
Eternalcity
Eternalflame
Eternallife
Eternally
Eternaloptimist
Eternalrest
Eternalsoul