Spelling pattern – ation and ssion for spelling of ‘shun’ sounding words.
When words have 3 syllables and the third is an a sound, and the ending of the word is a shun sound, then the spelling pattern is ation
Occasion is sion as there is only one syllable before the a sound, but there are some words that have ation with 2 syllables (this is the most popular spelling of shun when an a precedes it)
e.g
migration, translation, location
You also have some spellings with ssion for ‘shun’. These are usually when the root word ends in ss, but you can also see some root spellings end in mit.
Here are your spellings :
compassion
discussion
expression
*** transmission (transmit – root word. If the root word has a mit, then it is altered by adding ssion)
***admission (admit root word)
application
calculation
preparation
operation
education
