Which combanations of letters make the shun sound?

There are several combinations of letters that create the "shun" sound in English:

Common combinations:

* tion: nation, action, question

* sion: vision, decision, collision

* cian: musician, electrician, physician

* tial: potential, essential, partial

* cious: precious, delicious, suspicious

* tious: nutritious, ambitious, cautious

Less common combinations:

* sh: fashion, cushion, motion (though this is a more direct "sh" sound)

* ce: ocean, science (often pronounced with a "sh" sound)

* ci: ancient, conscience (often pronounced with a "sh" sound)

* ch: machine, chandelier (can be pronounced with a "sh" sound, especially in British English)

Note: The pronunciation of these letter combinations can vary depending on the word and regional accent.