staunch (v.)
staunch (adj.)
- airtight
- ardent
- bigoted
- calculable
- close
- committed
- compact
- consistent
- constant
- dedicated
- dependable
- devoted
- dogmatic
- evangelical
- faithful
- fast
- firm
- fixed
- flinty
- fundamentalist
- hermetic
- hidebound
- immovable
- inflexible
- infrangible
- invincible
- liege
- lightproof
- long-lasting
- loyal
- predictable
- puritanical
- rainproof
- reliable
- resolute
- rigid
- rugged
- sealed
- seaworthy
- secure
- set
- settled
- snug
- solid
- sound
- stable
- steadfast
- steady
- steely
- stormproof
- stout
- straitlaced
- strict
- strong
- sturdy
- substantial
- sure
- tested
- tight
- tough
- tried
- true
- true-blue
- trusted
- trustworthy
- trusty
- unbending
- unbreakable
- undeviating
- unfailing
- unfaltering
- unflappable
- unflinching
- unshaken
- unshrinking
- unswerving
- unwavering
- unyielding
- waterproof
- watertight
- well-founded
- well-grounded
- well-made