There's a few to choose from:
Calamine
Chiolite
Chlorite
Chromite
Chromium
Cinnabar
Corundum
Cryolite
and Cubanite
There are several trees that all start with the letter 'p' and are five letters long. The name of one tree that starts with the letter 'p' and is five letters long is the peach tree.
Estelle
Albotross
Taro is an edible root that starts with the letter T and is four letters long. It is commonly used in various cuisines around the world.
Pizza, pasta.
Roast
Artichoke and asparagus are vegetables.
guillemot
furlough
oblong.
isogloss
Adduction, annuities, annulment, assurance