If brave and courageous were used in the same sentence they would be examples of synonyms. They both have same or similar definitions.
13) Leave a message
14) High school
15) Appreciation
Answer:
You're correct
You can alternatively sayおなかがすいたときにたべます。as well, but your sentence is perfect.
Kanji version of what you wrote would be: 私はお腹がすいた時に食べます。
Answer: Pepani ngati izi sizikuthandizani koma ndikufunikiradi mfundozo.
Explanation: