Synonyms of harder

1 Syllable

set, firm, stiff, tough, thick, strong

2 Syllables

stony, compact, dense, packed, rigid, iron, rocky, solid, callous

3 Syllables

unyielding, compacted, hardened, compressed

4 Syllables

concentrated, indurated, inflexible, indurate

5 Syllables

consolidated, adamantine, impenetrable