Synonyms of sterner

1 Syllable
hard, tough, cruel, strict, harsh, grim, rough
2 Syllables
stubborn, steely, hard-core, mulish, flinty, rigid, hard-shell, hang-tough, frowning, bitter, hard-line
3 Syllables
forbidding, unyielding, rigorous, stiff-necked, austere, unsparing, severe, hardheaded, bullheaded, astringent, mortified, ascetic, relentless, hard-boiled, hard-nosed
4 Syllables
dyed-in-the-wool, implacable, unrelenting, inflexible
5 Syllables
inexorable, disciplinary