What are the differences between a bulb, corm, tuber, tuberous root, and rhizome?

Question

What are the differences between a bulb, corm, tuber, tuberous root, and rhizome?

Accepted Answer

Many differences exist, but each of these structures is actually a modified stem that grows below ground. The following lists the major differences between each of these structures:

Plant Structure, Function, and Use

Roots

What are the differences between a bulb, corm, tuber, tuberous root, and rhizome?