Synonyms of proper

proper

adjective

ˈprä-pər 

1

as in polite

following the established traditions of refined society and good taste

the formal ball called for proper attire—tuxedos and full-length gowns only

Synonyms & Similar Words

• polite
• satisfactory
• respectable
• correct
• acceptable
• decorous
• nice
• adequate
• formal
• decent
• elegant
• dress
• befitting
• genteel
• seemly
• relevant
• gracious
• tolerable
• dignified
• prim
• de rigueur
• permitted
• apt
• dressy
• compatible
• authorized
• congenial
• stuffy
• harmonious
• kosher
• material
• allowed
• priggish
• stiff

Antonyms & Near Antonyms

• improper
• inappropriate
• incorrect
• unsatisfactory
• indecent
• unseemly
• unacceptable
• informal
• intolerable
• unbecoming
• casual
• indelicate
• shabby
• indecorous
• barred
• forbidden
• prohibited
• tacky
• seedy
• ungenteel
• disallowed
• grungy
• proscribed
• awkward
• gauche
• banned
• outlawed
• interdicted
• ungraceful

2

as in correct

being in agreement with the truth or a fact or a standard

there is really more than one proper way to pronounce that word in English

Synonyms & Similar Words

• correct
• accurate
• true
• good
• precise
• right
• exact
• so
• logical
• valid
• legitimate
• dead-on
• perfect
• veracious
• on the money
• bang on
• sound
• spot-on
• on-target
• on target
• rigorous
• strict
• flawless
• impeccable
• stringent
• faultless
• infallible
• letter-perfect
• errorless
• inerrant

Antonyms & Near Antonyms

• improper
• wrong
• false
• off
• incorrect
• inaccurate
• untrue
• defective
• imperfect
• faulty
• inexact
• flawed

3

as in formal

marked by or showing careful attention to set forms and details

we had nodded and said hello to one another but had never had a proper introduction

Synonyms & Similar Words

• formal
• correct
• nice
• decorous
• ceremonious
• solemn
• civil
• stiff
• punctilious
• starchy
• polite
• stilted
• polished
• stately
• sober
• refined
• courtly
• chivalrous
• gallant
• stiff-necked
• courteous
• genteel
• red-carpet

Antonyms & Near Antonyms

• informal
• casual
• improper
• easygoing
• unceremonious
• indecorous
• unmannerly
• laid-back
• rude
• discourteous
• impolite

4

as in appropriate

meeting the requirements of a purpose or situation

you'll need to have a proper diet if you want to lose weight

Synonyms & Similar Words

• appropriate
• suitable
• fitting
• good
• fit
• fitted
• adequate
• right
• happy
• applicable
• meet
• in order
• pretty
• needed
• acceptable
• balanced
• apt
• becoming
• felicitous
• required
• befitting
• satisfactory
• requisite
• deserved
• decent
• able
• correct
• capable
• competent
• justified
• decorous
• qualified
• rightful
• just
• condign
• trained
• serviceable
• respectable
• tolerable
• kosher
• harmonious
• cut out
• consonant
• pitch-perfect
• seemly
• congruous
• companionate

Antonyms & Near Antonyms

• improper
• wrong
• inappropriate
• unsuitable
• unfit
• incapable
• unseemly
• indecent
• inapplicable
• incongruous
• inadequate
• unhappy
• unfitting
• unbecoming
• incompetent
• inapt
• unskilled
• unsatisfactory
• unqualified
• inapposite
• untrained
• unacceptable
• inept
• inexpert
• infelicitous
• unapt
• intolerable
• unskillful
• unmeet
• incorrect
• unbeseeming
• malapropos
• misbecoming
• indecorous
• incompatible
• graceless
• uncongenial

5

as in distinguishing

serving to identify as belonging to an individual or group

malaria and other diseases that are proper to the tropics

Synonyms & Similar Words

• distinguishing
• distinctive
• characteristic
• distinct
• typical
• peculiar
• diagnostic
• identifying
• individual
• unmistakable
• classic
• symptomatic
• diagnostical
• discriminating
• usual
• general
• specific
• generic
• normal
• common
• idiosyncratic
• special
• particular
• regular
• identifiable
• pronounced
• especial
• model
• paradigmatic
• archetypal
• archetypical

Antonyms & Near Antonyms

• atypical
• uncharacteristic
• untypical
• nontypical

Synonym Chooser

How does the adjective proper differ from other similar words?

Some common synonyms of proper are appropriate, apt, felicitous, fitting, fit, happy, meet, and suitable. While all these words mean "right with respect to some end, need, use, or circumstance," proper suggests a suitability through essential nature or accordance with custom.

proper acknowledgement

When would appropriate be a good substitute for proper?

Although the words appropriate and proper have much in common, appropriate implies eminent or distinctive fitness.

an appropriate gift

When can apt be used instead of proper?

The meanings of apt and proper largely overlap; however, apt connotes a fitness marked by nicety and discrimination.

apt quotations

When is it sensible to use felicitous instead of proper?

While in some cases nearly identical to proper, felicitous suggests an aptness that is opportune, telling, or graceful.

a felicitous phrase

When is fit a more appropriate choice than proper?

In some situations, the words fit and proper are roughly equivalent. However, fit stresses adaptability and sometimes special readiness for use or action.

fit for battle

When might fitting be a better fit than proper?

The words fitting and proper can be used in similar contexts, but fitting implies harmony of mood or tone.

a fitting end

In what contexts can happy take the place of proper?

The words happy and proper are synonyms, but do differ in nuance. Specifically, happy suggests what is effectively or successfully appropriate.

a happy choice of words

When could meet be used to replace proper?

The synonyms meet and proper are sometimes interchangeable, but meet suggests a just proportioning.

meet payment

Where would suitable be a reasonable alternative to proper?

While the synonyms suitable and proper are close in meaning, suitable implies an answering to requirements or demands.

clothes suitable for camping

Example Sentences

Recent Examples of proper

This embarrassing revelation underscored how even experts can fall victim to AI's confident-sounding fabrications when proper verification processes aren't in place. —Douglas B. Laney, Forbes.com, 17 Aug. 2025

Its soft look provides a welcoming feeling when located along an entryway or at an entrance proper. —Joshua Siskin, Oc Register, 16 Aug. 2025

Assuming that the administrative use of AI is done with proper security and rigor, most clients or patients won’t especially care that the therapist is using AI in that manner. —Lance Eliot, Forbes.com, 6 Aug. 2025

For example, some foundations have not been regularly reconciling their accounts and have made some expenditures without proper prior approval or supporting documentation, such as receipts or invoices, according to the audit. —Kristen Taketa, San Diego Union-Tribune, 6 Aug. 2025