steadfast Synonyms

unshakable unwavering steady stiff unfaltering firm unswerving staunch true tireless tenacious rigid true-blue trusty unbending uncompromising unfailing unflinching unmovable sustained stubborn sedulous set settled single-minded sound stable stabler staid stalwart staying stiff-necked stout-hearted strong strong-minded unmoved unrelenting unremitting undeterred rocklike rock-ribbed rock steady steady-going surefooted unapprehensive unbendable undiscouraged unwearying unfluctuating unintimidated