Regular

Adjective:

Regular

Meaning: adj. happening or being repeated at the same times.

For example:
- We have a regular meeting every Friday.

Sane

Adjective:

Sane

Meaning: adj. able to think and act in a normal and reasonable way.

For example:
- When you suggested that terrible idea I wondered if you were sane!

Suitable

Adjective:

Suitable

Meaning: adj. right or acceptable for a particular purpose.

For example:
- This program would certainly be suitable for managing our resources.