stalwart (n.)
- abettor
- admirer
- advocate
- aficionado
- angel
- apologist
- backer
- bold
- bouncing
- brave
- buff
- bulldog
- bully
- bullyboy
- burly
- champion
- chutzpanik
- colossus
- daring
- defender
- demigod
- dependence
- endorser
- exponent
- fan
- fat
- firm
- fit
- flush
- full
- gallant
- game
- gamecock
- giant
- gorilla
- gross
- hale
- hard
- hardy
- heeler
- hero
- heroic
- heroine
- hippy
- husky
- lion
- lover
- loyalist
- mainstay
- maintainer
- mighty
- overweight
- paladin
- partisan
- patron
- plump
- powerhouse
- promoter
- protagonist
- regular
- reliance
- roly-poly
- rude
- second
- seconder
- sectary
- sider
- solid
- sponsor
- square
- squat
- standby
- stout
- strong
- support
- supporter
- sustainer
- sympathizer
- tiger
- tough
- trouper
- upholder
- vital
- votary
- well-wisher
stalwart (adj.)
- able-bodied
- adipose
- athletic
- audacious
- beefy
- big-bellied
- blowzy
- bold
- bosomy
- bouncing
- brave
- brawny
- buff
- bully
- burly
- buxom
- champion
- chivalric
- chivalrous
- chubby
- chunky
- corpulent
- courageous
- daring
- dauntless
- determined
- dumpy
- fat
- fattish
- fearless
- firm
- fit
- fleshy
- flush
- forceful
- forcible
- full
- full-blooded
- full-strength
- gallant
- game
- giant
- greathearted
- gross
- gutsy
- hale
- hard
- hardy
- healthy
- hearty
- heavyset
- hefty
- heroic
- hippy
- husky
- imposing
- indefatigable
- indomitable
- intrepid
- knightly
- lion
- lionhearted
- lover
- lusty
- manful
- manly
- meaty
- mettlesome
- mighty
- muscular
- nervy
- obese
- obstinate
- overweight
- partisan
- paunchy
- persevering
- persistent
- plucky
- plump
- podgy
- portly
- potbellied
- potent
- powerful
- pudgy
- puffy
- puissant
- pursy
- red-blooded
- redoubtable
- regular
- relentless
- resolute
- robust
- robustious
- roly-poly
- rotund
- rude
- rugged
- second
- sinewy
- soldierlike
- soldierly
- solid
- spirited
- square
- squat
- squatty
- standby
- staunch
- steadfast
- steely
- stocky
- stout
- stouthearted
- strapping
- strong
- strong-willed
- sturdy
- support
- swollen
- tenacious
- thick-bodied
- thickset
- tireless
- top-heavy
- tough
- tubby
- unafraid
- unbending
- uncompromising
- undaunted
- unfaltering
- unflagging
- unflinching
- unswerving
- untiring
- unwavering
- unyielding
- valiant
- valorous
- vigorous
- vital
- well-fed