1 (express) thanks

2 gratitude

3 grateful

4 thankful

5 thanks

1 to thank

2 thanks

3 thank you

1 apex

2 crown of the head

3 top

4 roof

5 most

6 to carry on the head

7 to push to the top

8 to go against

9 to replace

10 to substitute

11 to be subjected to (an aerial bombing, hailstorm etc)

12 (slang) to "bump" a forum thread to raise its profile

13 classifier for headwear, hats, veils etc

1 replacement

2 substitution

3 metabolism (biol.)

1 to wither

2 to wilt

3 wizened

1 lit. three ignorant cobblers add up to a genius (idiom); fig. collective wisdom

2 wisdom of the masses exceeds that of any individual

1 to assume sb's name and take his place (idiom); to impersonate

2 to pose under a false name

1 to rub one's head and heels (idiom); to slave for the benefit of others

2 to wear oneself out for the general good

1 metabolism (biology)

2 the new replaces the old (idiom)

1 extremely bright (idiom)