vigorous (adj.)
- ablaze
- acid
- active
- acute
- afire
- aggressive
- animated
- ardent
- athletic
- authoritative
- balmy
- beefy
- biting
- blooming
- booming
- bouncing
- breathless
- brisk
- burning
- cartilaginous
- chewy
- clear
- cogent
- cohesive
- cordial
- coriaceous
- corrosive
- cutting
- dashing
- delirious
- driving
- drunk
- durable
- dynamic
- effective
- energetic
- enterprising
- enthusiastic
- excited
- exuberant
- fair
- fat
- febrile
- fervent
- fervid
- fevered
- feverish
- fibrous
- fiery
- fit
- flaming
- flourishing
- flowering
- flush
- flushed
- forceful
- forcible
- fruiting
- full-blooded
- full-strength
- glowing
- gristly
- gutsy
- halcyon
- hale
- hard
- hard-hitting
- hardy
- healthy
- hearty
- heated
- hefty
- high-powered
- high-pressure
- high-tension
- hot
- husky
- impassioned
- imperative
- impetuous
- impressive
- incisive
- intense
- intoxicated
- irresistible
- keen
- kinetic
- lasting
- leatherlike
- leathery
- lively
- living
- lusty
- masterful
- mettlesome
- mighty
- mordant
- muscular
- nervous
- nervy
- obstinate
- operative
- palmy
- passionate
- penetrating
- peppy
- piercing
- poignant
- potent
- powerful
- prospering
- proud
- puissant
- red-blooded
- red-hot
- resilient
- resistant
- robust
- robustious
- ropy
- rosy
- rough-and-ready
- rude
- rugged
- ruling
- sensational
- sinewy
- slashing
- sleek
- snappy
- spanking
- spirited
- sprightly
- spry
- stalwart
- steaming
- steamy
- steely
- stiff
- stout
- strapping
- strenuous
- striking
- stringy
- strong
- strong-willed
- stubborn
- sturdy
- telling
- tenacious
- thriving
- tough
- trenchant
- unrestrained
- untiring
- valid
- vibrant
- viscid
- vital
- vivacious
- vivid
- warm
- wiry
- zealous
- zestful
- zesty
- zippy
