Synonymes hard (anglais)

Adverbe
- activity : vigourously, energetically, violently
- characteristic : firmly, solidly
- property : earnestly, incessantly, intently
- property : severely, gallingly, harshly, with difficulty

Adjectif
- behaviour : cruel, grinding, harsh, oppressive, rough, severe, unmerciful, unrelenting
- behaviour : severe, adamant, austere, callous, cruel, exacting, harsh, relentless
- character trait : unfriendly, harsh, unkind, unpleasant
- character trait : shrewd, callous, unsentimental, unsympathetic
- characteristic : solid, adamantine, compact, firm, impenetrable, inflexible, resistant
- characteristic : alcoholic, intoxicating, inebriating, spirituous, stimulating, strong
- fact : irrefutable, incontrovertible, undeniable
- nature : stormy, inclement, severe, tempestuous, vigourous, violent
- property : difficult, arduous, burdensome, exhausting, fatiguing, laborious, onerous, toilsome
- property : complicated, complex, formidable, difficult, intricate, perplexing, puzzling