- renewable
Solar energy is a renewable source.
Renewable energy come from natural resources.
- replace
Don't let anyone else replace you.
This stall will be replaced soon.
- shortage
There was a shortage of water in my village last summer.
Our school faced a shortage of teachers last semester
- slogan
There are so many meaningful slogans.
A slogan should be easy to read.
- solar
The Sun is included in the solar system.
Solar energy is being used more widely.
- source
The Internet is a good source to learn.
Show me the source code!
