Answer:
1. salutation - the greeting of a letter
2. grimace - contortion of face showing pain
3. etymology - study of word history
4. shaking hands - common gesture of friendship
5. so, also, therefore - transitional words or expressions
6. coherence - logic; order
7. brainstorming - way to come up with ideas
8. pout - facial expression using mouth
9. posture - way of holding the body
10. adjustment - a type of business letter