Key Difference: In hemodialysis, blood is pumped out of your body to an artificial kidney machine, and returned to your body by tubes that connect you to the machine. In peritoneal dialysis, the inside lining...

A frown is a simpler expression which most people instinctively know. It involves in the lips turning downward, and the furrowing of the brow. A grimace is usually characterized as an ugly, twisted expression...

Foreword is a short piece of writing found at the start of the book or piece of literature and written by someone other than the primary author of the literature. A preface is a short piece of literature that...

The main difference between tattoo and body art is that tattoo is a type of body art, while body is more of an umbrella term that includes many different techniques of art.

A simple way to distinguish between the two is to use type when referring to classifying or grouping something, while using form when talking about the structure and make of something.