Synonyms of severest

1 Syllable

hard, firm, stiff, cruel, strict, stern, dour, harsh, cold, grim

2 Syllables

earnest, biting, sober, grave, serious, flinty, caustic, rigid, cutting, close, scathing

3 Syllables

forbidding, pitiless, resolved, strait-laced, austere, unchanging, unsparing, unfeeling, astringent, unsmiling, tight-lipped, relentless, hard-nosed, unbending

4 Syllables

oppressive, obdurate, unrelenting, resolute, iron-handed, peremptory, inflexible, satirical, disapproving

5 Syllables

unalterable, inexorable

6 Syllables

inconsiderate