Level: C1
(1) Denoting chiefly the agent/doer
-ain (an, en, on): chieftain, artisan, citizen, surgeon
-ar (er, eer, ier, ary): scholar, preacher, engineer, financier, missionary
-ate (ee, ey, y): advocate, trustee, attorney, deputy
-or (our, eur, er): emperor, saviour, amateur, interpreter
(2) Denoting state, action, result of an action
-age: bondage, marriage, breakage, leakage
-ance (ence): abundance, brilliance, assistance, excellence, innocence
-cy: fancy, accuracy, lunacy, bankruptcy
-ion: action, opinion, union
-ice (ise): service, cowardice, exercise
-ment: punishment, judgment, improvement
-mony: parsimony, matrimony, testimony
-tude: servitude, fortitude, magnitude
-ty: cruelty, frailty, credulity
-ure: pleasure, forfeiture, vedure
-y: misery, victory
(3) Forming diminutives
-cule (ule, cel, sel, el, le): animalcule, globule, parcel, damsel, chapel, circle
-et: owlet, lancet, trumpet
-ette: cigarette, coquette
(4) Denoting place
-ary (ery, ry): dispensary, library, nunnery, treasury
-ter (tre): cloister, theatre