Synonyms of firm

firm 1 of 2

noun

as in company

a commercial or industrial activity or organization

merged with another firm to become a major player in the brokerage business

Synonyms & Similar Words

• company
• house
• business
• interest
• enterprise
• corporation
• concern
• agency
• establishment
• association
• outfit
• conglomerate
• multinational
• dealer
• chain
• trust
• outlet
• syndicate
• cartel
• combine
• microenterprise

firm

2 of 2

adjective

ˈfərm 

1

as in solid

not showing weakness or uncertainty

a friendly fellow with a ready smile and a firm handshake

Synonyms & Similar Words

• solid
• strong
• sturdy
• vigorous
• robust
• iron
• powerful
• tough
• forceful
• stout
• hearty
• mighty
• hard
• lusty
• unyielding
• lively
• ironclad
• confident
• brisk
• perky
• springy
• vital
• certain
• energetic
• spirited
• secure
• sprightly
• animated
• vivacious
• jazzy
• sure
• jaunty
• assured
• sanguine
• frisky
• peppy
• zippy
• sprightful

Antonyms & Near Antonyms

• weak
• uncertain
• feeble
• fragile
• frail
• limp
• listless
• spiritless
• insecure
• diffident
• weakened
• spineless
• wimpy
• characterless
• effete
• wishy-washy
• weak-kneed
• self-doubting

2

as in hard

having a consistency that does not easily yield to pressure

cold butter that was too firm to spread

Synonyms & Similar Words

• hard
• solid
• stiff
• compact
• rigid
• thick
• unyielding
• compressed
• heavy
• dense
• sturdy
• hardened
• stiffened
• compacted
• unbending
• tempered
• indurated
• substantial
• close
• inflexible
• thickset
• inelastic
• condensed
• case-hardened
• adamantine
• rocklike
• ramrod
• impenetrable
• impermeable
• nonporous

Antonyms & Near Antonyms

• soft
• thin
• loose
• spongy
• flabby
• flexible
• elastic
• scattered
• pliable
• malleable
• supple
• pliant
• light
• squishy
• limp
• floppy
• slack
• squashy
• flaccid
• airy
• porous
• droopy
• lank
• bendable
• permeable
• ultrasoft

3

as in stuck

firmly positioned in place and difficult to dislodge

was firm in the saddle during the canter

Synonyms & Similar Words

• stuck
• tight
• jammed
• frozen
• glued
• lodged
• embedded
• set
• fast
• wedged
• clamped
• secured
• attached
• snug
• anchored
• cemented
• bonded
• bound
• entrenched
• immovable
• unyielding
• fastened
• impacted
• implanted

Antonyms & Near Antonyms

• loose
• insecure
• detached
• unsecured
• movable
• unbound
• unattached
• freed
• undone
• yielding
• loosened
• unfastened
• dislodged

4

as in resolute

fully committed to achieving a goal

asked him to reconsider, but he was firm in his commitment to the project

Synonyms & Similar Words

• resolute
• determined
• intent
• confident
• decisive
• positive
• out
• bound
• resolved
• adamant
• set
• purposeful
• bent (on or upon)
• single-minded
• do-or-die
• serious
• hell-bent (on or upon)
• hardened
• persistent
• certain
• earnest
• steady
• vehement
• sure
• on one's mettle
• willful
• unwavering
• stubborn
• unswerving
• bitter
• immovable
• rigid
• unyielding
• unbending
• cocksure
• tenacious
• unfaltering
• unhesitating
• uncompromising
• obdurate
• unrelenting
• hard
• implacable
• inflexible
• dogged
• adamantine
• hardheaded
• headstrong
• pigheaded
• pertinacious
• mulish
• perverse
• self-willed

Antonyms & Near Antonyms

• hesitant
• unresolved
• faltering
• uncertain
• undetermined
• irresolute
• doubtful
• skeptical
• indecisive
• unsure
• suspicious
• dubious
• unconvinced
• unsettled
• reluctant
• undecided
• wavering
• distrustful
• vacillating
• mistrustful
• weak-kneed
• loath
• indisposed
• disinclined

5

as in stable

having been established and usually not subject to change

the selling price of the house is firm, so there'll be no dickering

Synonyms & Similar Words

• stable
• certain
• final
• fixed
• unchangeable
• unchanging
• settled
• flat
• determinate
• hard
• frozen
• set
• steady
• constant
• hard-and-fast
• inexpugnable
• uniform
• specific
• good
• definite
• explicit
• solid
• reliable
• dependable
• unwavering
• responsible
• exact
• trustworthy
• stated
• true
• nonnegotiable
• safe
• sure
• stipulated
• given
• nonadjustable
• noncancelable
• trusty
• tried
• tried-and-true

Antonyms & Near Antonyms

• adjustable
• negotiable
• changeable
• indefinite
• unspecified
• variable
• uncertain
• fluid
• volatile
• unstable
• unpredictable
• unsettled
• capricious
• mercurial
• unsteady
• temperamental
• fluctuating
• inconstant
• open-ended
• mutable
• changeful
• flickery

6

as in sturdy

marked by the ability to withstand stress without structural damage or distortion

built on a firm foundation, so the house hasn't settled

Synonyms & Similar Words

• sturdy
• strong
• stable
• sound
• stalwart
• durable
• reliable
• fast
• bombproof
• dependable
• solid
• tough
• unbreakable
• cohesive
• beefy
• irrefragable
• infrangible

Antonyms & Near Antonyms

• unstable
• weak
• rickety
• unsound
• unsteady
• insecure
• shaky
• infirm
• wobbly
• unbalanced
• tottering
• unsubstantial
• tottery

7

as in reasonable

based on sound reasoning or information

that assassination theory is far from firm, since there's not a shred of actual evidence to back it up

Synonyms & Similar Words

• reasonable
• logical
• good
• reasoned
• solid
• valid
• sensible
• hard
• rational
• justified
• true
• informed
• just
• well-founded
• sober
• real
• commonsense
• actual
• plausible
• levelheaded
• credible
• validated
• commonsensible
• certain
• commonsensical
• convincing
• sure
• substantiated
• certified
• confirmed
• cogent
• verified
• corroborated
• colorable

Antonyms & Near Antonyms

• unreasonable
• irrational
• groundless
• unsound
• unfounded
• unjustified
• invalid
• uninformed
• illogical
• weak
• nonrational
• nonsensical
• unsupported
• unwarranted
• unsubstantiated
• flimsy
• nonvalid
• unreasoned
• false
• implausible
• unconvincing
• misguided
• fallacious
• misled

Example Sentences

Recent Examples of firm

Noun

In the year since Karp's visit to the White House, eight other firms have followed its lead, agreeing to a total of over $1 billion in pro bono work for causes near and dear to the president, the Times reported today. — Eve Batey, Vanity Fair, 2 Aug. 2026

Industrial companies and technology firms have already secured rights to the electricity generated at the site. — Aman Tripathi, Interesting Engineering, 2 Aug. 2026

Adjective

Led by the defence, who went in hard and firm on Chelsea’s attackers, Tottenham upped the intensity against their London rivals. — Elias Burke, New York Times, 1 Aug. 2026

Targeting firm power for rising demand The ARC-100 is designed to provide flexible, dispatchable power from a compact footprint. — Atharva Gosavi, Interesting Engineering, 1 Aug. 2026

Phrases Containing firm

• firm (up)