Synonyms and antonyms of Solid, stiff or hard in American Thesaurus

solid (adjective)

science a solid substance is firm and hard and is not a liquid or a gas

stiff (adjective)

firm and difficult to bend

hard (adjective)

stiff, firm, and not easy to bend or break

firm (adjective)

solid but not hard

inflexible (adjective)

stiff and not able to bend

rigid (adjective)

stiff, hard, and difficult to bend or move

unyielding (adjective)

mainly literary very hard, or firm

packed (adjective)

packed snow, sugar, or soil has been pressed together firmly to form a hard mass

rock-hard (adjective)

extremely hard

impenetrable (adjective)

impossible to get into or get through

erect (adjective)

an erect penis or nipple is stiff and sticks out or up

erectile (adjective)

capable of becoming erect

hardness (noun)

the quality of being stiff, firm, and not easy to bend or break

rock-solid (adjective)

extremely hard

set (noun)

the condition of becoming firm or solid

solidity (noun)

the quality of being solid

stiffly (adverb)

in a way that shows you cannot move your body easily