Synonyms of hard-shelled

1 Syllable

taut, hard, firm, stiff, cruel, strict, stern, harsh

2 Syllables

narrow, stubborn, ruthless, headstrong, fierce, vicious, violent, fixed, callous, hard-line, drastic

3 Syllables

ferocious, pugnacious, ruffianly, unyielding, terrible, severe, adamant, merciless, savage, hard-bitten, hard-boiled, hard-nosed, unbending, confirmed, exacting

4 Syllables

intractable, unforgiving, immutable, obdurate, resolute, inflexible, refractory, arbitrary, desperate

5 Syllables

unalterable, uncompromising, uncontrollable, unmanageable