1. Bravery: When the dog saved its owner from drowning in the river, everyone appreciated its bravery.

Boldness: When the politician came to her doorstep asking for votes, the woman showed boldness by asking him some crucial questions.

2. Quite: We can all rest at his bungalow as it is quite big.

Quiet: Please be quiet. I want to hear the announcement.

3. Infectious: Although the joke wasn’t very funny, her infectious laughter made all of us burst into laughter.

Contagious: Cures for many contagious diseases were found in the 20th century.

4. Clever: The clever crow dropped pebbles into the pot to make the water come up to the brim.

Intelligent: Birbal was intelligent enough to give solutions to Akbar every time Akbar faced a problem.

5. Further: I do not want any further argument about this topic.

Farther: We had walked farther than we wanted to.

6. Discovery: Pasteur discovered that germs were everywhere, in the air, water and soil. Invention: Edison invented the bulb.

7. Vaccination: Introducing live organisms into the body to generate immunity is vaccination.

Inoculation: Introduction of weak or dead organisms into the body to produce immunity is called inoculation.

8. Due to: The roads were flooded due to rain.

Owing to: Owing to his mistake, the accounts had to be checked all over again. 

9. Little: Can you give me some water? There is little water in my bottle.

A little: Only a little is known about the writer of this novel. Let us try to know more.

10. Between: Both of them shared the cake equally between them.

Among: He tried to sow hatred among the people.