Synonyms of rigid

rigid

adjective

ˈri-jəd 

1

as in strict

not allowing for any exceptions or loosening of standards

rigid enforcement of drug laws

Synonyms & Similar Words

• strict
• rigorous
• inflexible
• stringent
• uncompromising
• exacting
• hard-line
• steadfast
• cast-iron
• adamant
• conscientious
• meticulous
• stubborn
• unbending
• relentless
• punctilious
• brassbound
• undeviating
• scrupulous
• exact
• tough
• close
• tenacious
• unflinching
• painstaking
• unyielding
• immovable
• adamantine
• harsh
• fussy
• implacable
• determined
• stern
• resolved
• firm
• hardened
• unrelenting
• dogged
• severe
• austere
• single-minded
• hard
• unsparing
• demanding
• grim
• flinty
• unappeasable
• ironbound
• hard-hearted

Antonyms & Near Antonyms

• flexible
• loose
• lax
• relaxed
• slack
• compliant
• pliable
• pliant
• easy
• soft
• acquiescent
• gentle
• mild
• yielding
• lenient
• tolerant
• indulgent
• merciful
• easygoing
• kindly
• compromising
• negligent
• sloppy
• slovenly
• slipshod
• neglectful
• relenting
• remiss
• spoiling
• pampering
• unfussy

2

as in tough

given to exacting standards of discipline and self-restraint

a rigid man who cannot seem to relax

Synonyms & Similar Words

• strict
• tough
• authoritarian
• harsh
• rigorous
• stern
• hard
• hardened
• severe
• relentless
• austere
• merciless
• gruff
• flinty
• steadfast
• ramrod
• demanding
• heavy-handed
• stiff
• inflexible
• unbending
• adamant
• unforgiving
• unyielding
• uncompromising
• exacting
• immovable
• pitiless
• implacable
• ossified
• hard-line
• callous
• ascetic
• unrelenting
• determined
• adamantine
• bullying
• dour
• uncharitable
• monastic
• monkish
• unsparing
• unflinching
• obstinate
• intractable
• firm
• hard-hearted
• rock-ribbed
• resolved
• dogged
• single-minded
• browbeating

Antonyms & Near Antonyms

• gentle
• lax
• easy
• lenient
• tolerant
• indulgent
• soft
• forbearing
• mild
• easygoing
• patient
• kind
• charitable
• undemanding
• merciful
• accepting
• flexible
• clement
• responsive
• willing
• yielding
• compliant
• laid-back
• pliable
• agreeable
• amenable
• softhearted
• pliant
• acquiescent
• compromising
• complaisant

3

as in hard

having a consistency that does not easily yield to pressure

rigid steel bars that should be able to hold the weight

Synonyms & Similar Words

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

Antonyms & Near Antonyms

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

4

as in stiff

incapable of or highly resistant to bending

corsets, those rigid undergarments for women, must have been murder to wear

Synonyms & Similar Words

• stiff
• stiffened
• solid
• inflexible
• brittle
• unyielding
• strong
• dense
• hard
• compact
• sound
• crisp
• inelastic
• substantial
• firm
• rheumatic
• arthritic
• nonelastic
• nonmalleable

Antonyms & Near Antonyms

• flexible
• pliable
• floppy
• elastic
• pliant
• supple
• workable
• resilient
• yielding
• plastic
• stretchy
• malleable
• springy
• soft
• flaccid
• semiflexible
• flabby
• mushy
• squishy
• droopy
• limp
• squashy
• lithe
• limber
• willowy
• lank
• lissome
• lithesome
• semisoft

5

as in tight

stretched with little or no give

make sure that the clothesline is rigid so that the longer garments don't drag on the ground

Synonyms & Similar Words

• tight
• taut
• tightened
• tense
• stiff
• inflexible
• unyielding
• firm
• unrelaxed

Antonyms & Near Antonyms

• loose
• lax
• slack
• floppy
• hanging
• flexible
• limp
• flaccid
• relaxed
• elastic
• sagging
• loosened
• yielding
• resilient
• lank
• droopy
• pliant
• supple
• springy
• slackened
• drooping
• stretchy

Synonym Chooser

How is the word rigid distinct from other similar adjectives?

Some common synonyms of rigid are rigorous, strict, and stringent. While all these words mean "extremely severe or stern," rigid implies uncompromising inflexibility.

rigid rules of conduct

When would rigorous be a good substitute for rigid?

The synonyms rigorous and rigid are sometimes interchangeable, but rigorous implies the imposition of hardship and difficulty.

the rigorous training of recruits

When might strict be a better fit than rigid?

The words strict and rigid can be used in similar contexts, but strict emphasizes undeviating conformity to rules, standards, or requirements.

strict enforcement of the law

When could stringent be used to replace rigid?

Although the words stringent and rigid have much in common, stringent suggests severe, tight restriction or limitation.

stringent standards of admission

Example Sentences

Recent Examples of rigid

Edghill said the vessel was fitted with 250 life jackets, two rigid life rafts and six inflatable life rafts. — Arkansas Online, 19 July 2026

Amid noise, close quarters, and rigid routines, interactions become flash points. — Jordan Rau, NPR, 19 July 2026

Another way that the U-Penn system offers a massive improvement over previous rigid and hydrogel electrodes – which poorly adhere to hairy skin, or skin wet from perspiration – is in their actual dermal application. — New Atlas, 18 July 2026

Operating as close as possible to the Libyan search-and-rescue zone, its crew deployed fast rigid inflatable boats (RHIBs) to reach overcrowded inflatable dinghies before larger rescue vessels could arrive. — Isabella Wandermurem, Time, 17 July 2026