Here are some examples:
With "tion":
* Action: the process of doing something
* Attention: the act of noticing something
* Connection: the state of being linked
* Education: the process of learning
* Information: facts or details
* Nation: a large group of people living in a defined territory
* Solution: a way to solve a problem
* Station: a place where trains or buses stop
* Question: something you ask to find out information
With "sion":
* Decision: a choice made
* Vision: the ability to see
* Mission: a special task or purpose
* Tension: a feeling of stress or anxiety
* Revision: the act of changing something
With "cian":
* Physician: a doctor
* Musician: someone who plays music
* Technician: someone skilled in a particular technical field
With "cean":
* Ocean: a large body of saltwater
There are many more words with this sound! You can find more by browsing dictionaries or using online word lists.