effective (adj.)

• able
• acid
• active
• actual
• adequate
• authoritative
• banausic
• basic
• biting
• capable
• charismatic
• charming
• cogent
• compelling
• competent
• consequential
• conspicuous
• convincing
• corrosive
• cutting
• direct
• driving
• dynamic
• effectual
• efficacious
• efficient
• enchanting
• energetic
• essential
• estimable
• feasible
• forceful
• forcible
• functional
• functioning
• go
• gutsy
• high-powered
• high-pressure
• high-tension
• imperative
• important
• impressive
• incisive
• influential
• irresistible
• magnetic
• mighty
• momentous
• mordant
• moving
• nervous
• noticeable
• operable
• operational
• operative
• outstanding
• penetrating
• personable
• persuasive
• piercing
• poignant
• potent
• powerful
• practicable
• practical
• pragmatic
• prestigious
• productive
• proficient
• puissant
• real
• realizable
• remarkable
• reputable
• ruling
• sensational
• serviceable
• sinewy
• slashing
• sound
• striking
• strong
• suasive
• substantial
• telling
• trenchant
• true
• useful
• valid
• vigorous
• virtuous
• vital
• weighty
• winning
• workable