-Able or -Ible?

-Acy or -Asy?

-Ance or -Ence?

-Ancy or -Ency?

-Ant or -Ent?

-Ar, -Or, or -Er?

-Ary, -Ory, or -Ery?

-Efy or -Ify?

-Eous or -Ious?