1. Pontifex Maximus
A member of the pontifical college, which was presided over by a chief priest

2. Leave or give by will after one's death.
bequeath
Leave or give by will after one's death.

3. To express disapproval; to scold
chide
To express disapproval; to scold

4. Keep company with; hang out with.
consort
Keep company with; hang out with.

5. A cowardly and despicable person.
cur
A cowardly and despicable person.

6. communication of thought by words; talk; conversation
discourse
communication of thought by words; talk; conversation

7. echolocation
Determining the location of something by measuring the time it takes for an echo to return from it.

8. To admit to citizenship, especially to the right of voting.
enfranchisement
To admit to citizenship, especially to the right of voting.

9. To skim along the surface of water.
hydroplane
To skim along the surface of water.

10. Any of the natural numbers (positive or negative) or zero
integer
Any of the natural numbers (positive or negative) or zero

11. momentum
force or speed of movement; impetus, as of a physical object or course of events

12. A second-year undergraduate
sophomore
A second-year undergraduate

13. Rome wasn’t Built in a day
something that you say which means that it takes a long time to do an important job

14. The road to hell is paved with good intentions
 People often mean well but do bad things

15. rip
“Requiescat in Pace" and it is of Latin origin which essentially means, May he/she lay in peace.