aggression
cession
commission
compassion
concussion
depression
digression
discussion
fission
mission
passion
percussion
permission
profession
progression
possession
remission
session
succession
transgression
transmission
sugar
sure
tissue
issue
words ending in 'nsure' and 'ssure': censure, tonsure, assure, pressure
words ending in 'nsion' and 'ssion': tension, suspension, session, passion
mission
machine
passion
pressure
champagne
chevy
....so on.
assess possess
Sure
it sounds like sh
You answered your question in your question. The answer is Sure and Sugar.
In American English the name Charlene would sound like Sh-ar-lee-en. The Ch at the beginning sounds like the sh in words like share and sharp. The ar then sounds like the word are and the le sounds like the word lee. Finally the n sounds like en with just the n sound. The final e is silent and not heard at all, but it gives you the clue that the previous e is the long e sound.
E Shtune sounds like [e: sh t u n]
Normally like c in "cat", but in some words, like "kino" (cinema) and "kilo", it is pronounced like the kj sound, as in "kjole" (dress). The kj sound sounds like a sh sound to most foreigners, but it's different.
For the same reason ghr doesn't make the sound like a fr even though in 'rough' it is pronounced like an F: The wonderful English language is full of exceptions. Sometimes it does sound like an sh, as in the word chamois (pronounced sham'-ee). It also sounds like k, as in mach and charisma.
Lots of places in China, because "x" sounds like "sh" in China. So, Xi'an, for example.
There are many words, but one example is the word "father" in which the 'a' sounds like the 'o' in box.
You learn the exceptions as part of learning the language. The pronunciation can be found in any dictionary.
serial
fete
Sh-ee-oo (like a whistle kinda)