| noun | the members of a business organization that owns or operates one or more establishments “he worked for a brokerage house” |
| verb | become taut or tauter “Your muscles will firm when you exercise regularly” |
| verb | make taut or tauter “tauten a rope” |
| adjective | marked by firm determination or resolution; not shakable “firm convictions” |
| adjective | not soft or yielding to pressure “a firm mattress” |
| adjective | strong and sure “a firm grasp” |
| adjective | not subject to revision or change “a firm contract” |
| adjective | (of especially a person's physical features) not shaking or trembling “his voice was firm and confident” |
| adjective | not liable to fluctuate or especially to fall “stocks are still firm” |
| adjective | securely established “holds a firm position as the country's leading poet” |
| adjective | possessing the tone and resiliency of healthy tissue “firm muscles” |
| adjective | securely fixed in place “the post was still firm after being hit by the car” |
| adjective | unwavering in devotion to friend or vow or cause; ; ; - Campaign song for William Henry Harrison “a firm ally” |
| adverb | with resolute determination “we firmly believed it” |
| firmness | noun | the trait of being resolute |
| steadfastness | noun | steadfast resolution |
| steadiness | noun | freedom from wavering or indecision; constancy of resolve or conduct |
| stiffness | noun | firm resoluteness in purpose or opinion or action |
| solidness | noun | the consistency of a solid |
| solidity | noun | the consistency of a solid |
| fastness | noun | the quality of being fixed in place as by some firm attachment |
| immobility | noun | remaining in place |