-ency

-ency

suff. Condition or quality: complacency.
[Middle English, variant of -ence, -ence.]

-ency

suffix forming nouns a variant of -ence: fluency; permanency.

-ency

a noun suffix, equivalent to -ence: consistency; dependency; exigency. (-ence + -y3]

ency.

or encyc.

or encycl.,

encyclopedia.