To urge on:
* urge on: This is the correct spelling, meaning to encourage or push forward.
* urge awn: This is a misspelling.
Power of seeing:
* sight: This is the correct spelling, meaning the ability to see or the act of seeing.
* site: This refers to a location or position.
* cite: This means to quote or refer to.
Let me know if you'd like help with any other homophones!