Noun

• S: (n) firm (firm%1:14:00::), house (house%1:14:01::), business firm (business_firm%1:14:00::) (the members of a business organization that owns or operates one or more establishments) "he worked for a brokerage house"

Verb

• S: (v) tauten (tauten%2:30:00::), firm (firm%2:30:00::) (become taut or tauter) "Your muscles will firm when you exercise regularly"; "the rope tautened"
• S: (v) tauten (tauten%2:30:01::), firm (firm%2:30:01::) (make taut or tauter) "tauten a rope"

Adjective

• S: (adj) firm (firm%3:00:00:resolute:00), steadfast (steadfast%3:00:00:resolute:00), steady (steady%3:00:00:resolute:00), stiff (stiff%3:00:00:resolute:00), unbendable (unbendable%3:00:00:resolute:00), unfaltering (unfaltering%3:00:00:resolute:00), unshakable (unshakable%3:00:00:resolute:00), unwavering (unwavering%3:00:00:resolute:00) (marked by firm determination or resolution; not shakable) "firm convictions"; "a firm mouth"; "steadfast resolve"; "a man of unbendable perseverence"; "unwavering loyalty"
• S: (adj) firm (firm%3:00:00:hard:01), solid (solid%3:00:00:hard:01) (not soft or yielding to pressure) "a firm mattress"; "the snow was firm underfoot"; "solid ground"
• S: (adj) firm (firm%3:00:00:forceful:00), strong (strong%3:00:00:forceful:00) (strong and sure) "a firm grasp"; "gave a strong pull on the rope"
• S: (adj) firm (firm%3:00:00:settled:02) (not subject to revision or change) "a firm contract"; "a firm offer"
• S: (adj) firm (firm%3:00:00:steady:00) ((of especially a person's physical features) not shaking or trembling) "his voice was firm and confident"; "a firm step"
• S: (adj) firm (firm%3:00:02:stable:00), steady (steady%3:00:00:stable:00), unfluctuating (unfluctuating%3:00:00:stable:00) (not liable to fluctuate or especially to fall) "stocks are still firm"
• S: (adj) firm (firm%3:00:00:secure:02) (securely established) "holds a firm position as the country's leading poet"
• S: (adj) firm (firm%3:00:00:healthy:00) (possessing the tone and resiliency of healthy tissue) "firm muscles"
• S: (adj) fast (fast%3:00:00:fixed:00), firm (firm%3:00:00:fixed:00), immobile (immobile%3:00:00:fixed:00) (securely fixed in place) "the post was still firm after being hit by the car"
• S: (adj) firm (firm%3:00:00:faithful:00), loyal (loyal%3:00:00:faithful:00), truehearted (truehearted%3:00:00:faithful:00), fast (fast%3:00:00:faithful:00) (unwavering in devotion to friend or vow or cause) "a firm ally"; "loyal supporters"; "the true-hearted soldier...of Tippecanoe"- Campaign song for William Henry Harrison; "fast friends"

Adverb

• S: (adv) firm (firm%4:02:00::), firmly (firmly%4:02:02::), steadfastly (steadfastly%4:02:00::), unwaveringly (unwaveringly%4:02:00::) (with resolute determination) "we firmly believed it"; "you must stand firm"