There are many adjectives that start with the letter J:
Some Adjectives that begin with the letter J to describe a forest are: Jumbo, Jagged, Jumbled, and Jaded.
judicial
joyousjoyful
· juvenile
JacobinjadedJapanesejarringjaundicedjauntyJavanesejazzyjealousjeeringjejunejerkyJesuitJewishjigglyjinxedjitteryjoblessjockeyjocularjokerjokeyjokingjollyjoshingjovialjoyfuljoyousjubilantjudgmentaljudiciousjuicyjumbledjumpyjuniorjustjuvenile
jealous
joyful
joyful
junky
· jumbo
joyous, joyful
joyful