Synonyms for rigid

Some common synonyms of rigid are: rigid [a.] 1. Stiff, stiffened, inflexible, unpliant, unbending, unyielding. 2. Stiff, bristling, erect, precipitous, steep. 3. Sharp, severe, strict, stern, rigorous, harsh, austere, inflexible, exact, unmitigated. 4. Sharp, cruel.