tough Synonyms - page 6

punishing problematical powerful plucky pitiless perplexed oppressive iron-fisted involute heartless harsh hardy hardly hard-headed hard-handed hardened hale gutty gummy gritty gristly grinding grievous granitic gorilla heavy hefty intricate insensitive innutritious inflexible inelastic indurated indigestible indestructible implacable impenetrable husky hotspur hoodlum hood herculean hellish glutinous