lead
Not any that I know of. But you can make the stem really short.
it is the stem
Some words with the stem "cur" are current, curriculum, and currency.
Induct, deduct, product.
Conductor
Invest :)
tear duct
Some words with the stem "archy" include monarchy, oligarchy, anarchy, and hierarchy.
Words with the stem "ar" include: car, star, bar, and far.
Some words with the stem "loco" meaning place include locomotion, location, and relocate.
Some words that have the stem "equi" include equidistant, equilibrium, and equinox. These words usually relate to concepts of balance, equalness, or fairness.