A few days ago

What are the differences between the suffixes -ancy and -ency?

Both are indicators of quality or state but what are their differences? When would you use one instead of the other, and why?

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A few days ago

Favorite Answer

Roughly, -ancy refers to state based on actions or practice, while -ency suggests state based in inherent characteristics.

A few days ago
Both sufficency and deficency are spelled this way.

Truancy and necromancy are spelled like this.

It depends how the word is spelled before the suffix is added, hence: sufficiEnt and deficiEnt

contrasting with truAnt and necromAncer

Simple really!