-ant creates adjectives or agent nouns, -ance creates nouns.
adjective | noun | agent noun |
abundant adamant ambulant arrogant brilliant buoyant compliant confidant conversant defiant deviant discrepant distant dominant dormant elegant errant exorbitant extravagant exuberant flagrant fragrant flamboyant hesitant ignorant important incessant indignant itinerant jubilant luxuriant malignant mutant observant petulant pleasant pliant poignant pollutant predominant pregnant protuberant radiant rampant redundant relevant reliant reluctant repentant repugnant resistant retardant reverberant significant tolerant trenchant triumphant unpleasant vacant valiant verdant vibrant vigilant | abundance ambulance arrogance brilliance compliance defiance deviance distance dominance elegance exorbitance extravagance exuberance flagrance fragrance flamboyance hesitance ignorance importance luxuriance observance petulance predominance protuberance radiance relevance reliance reluctance repentance repugnance resistance significance tolerance valiance vigilance | accountant appellant applicant aspirant assistant attendant celebrant claimant cohabitant combatant commandant consultant contestant continuant decongestant defendant defoliant deodorant dependant descendant desiccant disinfectant entrant immigrant informant inhabitant interactant litigant lubricant merchant migrant militant mordant occupant participant peasant pedant propellant protestant refrigerant registrant ruminant savant servant stimulant supplicant sycophant tenant termagant truant tyrant vagrant |