deserve
If you say that a person or thing deserves something, you mean that they should have it or receive it because of their actions or qualities.
observe
If you observe a person or thing, you watch them carefully, especially in order to learn something about them.
reserve
If something is reserved for a particular person or purpose, it is kept specially for that person or purpose.
conserve
If you conserve a supply of something, you use it carefully so that it lasts for a long time.
preserve
- If you preserve a situation or condition, you make sure that it remains as it is, and does not change or end.
- If you preserve something, you take action to save it or protect it from damage or decay.