1. (noun) flint
a hard kind of stone; a form of silica more opaque than chalcedony
Antonyms: softhearted, soft-boiled
2. (noun) Flint, Flint River
a river in western Georgia that flows generally south to join the Chattahoochee River at the Florida border where they form the Apalachicola River
Antonyms: softhearted, soft-boiled
3. (adj) Flint
a city in southeast central Michigan near Detroit; automobile manufacturing
Antonyms: softhearted, soft-boiled
4. (adj) flinty, flint, granitic, obdurate, stony
showing unfeeling resistance to tender feelings
Synonyms: rocklike, rocky, unrepentant, stony, flinty, granitelike, granitic, bouldered, obdurate, flint, cussed, obstinate, bouldery
Antonyms: soft-boiled, softhearted
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Synonyms for flint 
