The syllable added to the end of a word is called a suffix. It can modify the meaning or change the grammatical function of the word.
The word "radiator" has the "ai" sound at the end of a syllable.
Celebration has an a at the end of a syllable: celebration.
"End." the word has only one syllable.
The syllable break in the word "hole" is at the end of the word, making it a single syllable word.
The spelling "oy" is usually found at the end of a word or syllable.
The word 'end' contains one syllable.
are-area
Celabration, and ache.
fumigation
...suffix.
Are is the three letter word. Add an A to the end and you have Area.