Edible camphor

Kapoor

Used by pinch, about 0.01–0.05 g; too potent for level-spoon measure.

Instead of Edible camphor

Nothing truly replaces edible camphor's sharp medicinal perfume; use the closest aromatic only in tiny amounts or omit it.

Screwpine water
Use only a few drops for a pinch of camphor. Adds a floral perfume, not camphor's sharp medicinal note; add off the heat.
Rosewater
Use a few drops for a pinch of camphor. Gentler and sweeter, with no camphor pungency.