rigorous laws

What Is The Similar Meaning Of Rigorous? strict, severe, stern, stringent, austere, spartan, tough, hard, harsh, rigid, cruel, savage, relentless, unsparing, inflexible, authoritarian, despotic, draconian, intransigent, uncompromising, demanding, exacting. What is the best synonyms for rigorous? harsh, heavy-handed, ramrod, rigid, severe, stern, strict, tough. What is the similar of meaning? 1 : having characteristics in