firm Synonyms - page 3

stiffen starched stated staunch staunchly staying steadfastly steely stern stuck stubborn durum unuttered unflagging unswerving unchanged undeterred confirmed unpermissive serious-minded well-made close-knit wholehearted unquestioning nonporous machine shop can-do carved in stone set in stone stabile unmodifiable unmoving multinational neck and neck immotile precast rockbound unbendable uncreative unhazardous uninfluenced unmalleable unshakeable unswayed unwaveringly well-balanced well-founded unchallengeable traditionalistic tenaciously