Since this is showing a relationship between the words (in this case the relationship is showing words that mean the same thing) , you would complete this statement my saying something like:
Loud is to noisy as change is to transformation (since transformation is a synonym to change)
or
Loud is to noisy as change is to modification
为什么在微信中添加你? 做朋友? 我还在上中文课，我只听得懂
