"Gnarled" vs. "Odorless": Unrelated Adjectives

Gnarled = twisted, knotted, deformed by age/exposure (trees, hands, roots).
Odorless = lacking smell.

They describe completely different attributes (morphology vs. olfaction) and are neither synonyms nor antonyms. A gnarled object can be odorless or fragrant; an odorless object can be smooth or gnarled.