Emigrate means exiting from a particular country or place, while immigrate means entering into another country with the intention of living and working there permanently.

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...

The main difference between a smile and a smirk is that a smile is when the lip curl upwards at the corner to express happiness or contentedness; whereas a smirk is a type of smile that displays smugness,...

Gay is an umbrella term, which covers any person who is a homosexual, regardless of gender. Lesbian is specifically used to refer to women who are attracted to other women.

Youth refers to a young person, i.e. a person between childhood and adult age. On the other hand, teenager refers to someone who is specifically between the ages of 13 and 19.