rigorous Synonyms - page 2

unstoppable straitlaced grueling unadaptable stringency strenuous carful systematic taxing thoroughgoing throughly tighter unerring unsparing uphill veridical stringently absolute comprobation conscientious correct crabstick critical definite difficile difficult diligent disciplinary disciplined draconian comprehensive close accurate anal apodixis arduous ascetic assiduous astringent attentive cast iron censorial chary clockwork drastic earnest ironclad literal mathematic mathematical