Synonyms of alter

alter

verb

ˈȯl-tər 

1

as in to modify

to make different in some way

can't you alter your plans just slightly so we can leave 10 minutes earlier?

Synonyms & Similar Words

• modify
• change
• remodel
• transform
• rework
• revise
• recast
• remake
• refashion
• vary
• redo
• revamp
• deform
• make over
• mutate
• metamorphose
• revolutionize
• transmute
• transfigure
• exchange
• convert
• regenerate
• retool
• commute
• rejigger

Antonyms & Near Antonyms

• set
• fix
• stabilize
• freeze

2

as in to fix

to remove the sex organs of

contends that cats and dogs that have been altered make better pets

Synonyms & Similar Words

• fix
• neuter
• sterilize
• emasculate
• desex
• castrate
• geld
• spay

Synonym Chooser

How is the word alter different from other verbs like it?

Some common synonyms of alter are change, modify, and vary. While all these words mean "to make or become different," alter implies a difference in some particular respect without suggesting loss of identity.

slightly altered the original design

When is it sensible to use change instead of alter?

In some situations, the words change and alter are roughly equivalent. However, change implies making either an essential difference often amounting to a loss of original identity or a substitution of one thing for another.

changed the shirt for a larger size

In what contexts can modify take the place of alter?

The synonyms modify and alter are sometimes interchangeable, but modify suggests a difference that limits, restricts, or adapts to a new purpose.

modified the building for use by the disabled

When might vary be a better fit than alter?

Although the words vary and alter have much in common, vary stresses a breaking away from sameness, duplication, or exact repetition.

vary your daily routine

Example Sentences

Recent Examples of alter

That was a life-altering moment. —Haadiza Ogwude, The Enquirer, 12 Sep. 2025

T cells are taken from the patient's blood and genetically altered in a lab before being returned to the patient's blood, according to the American Cancer Society. —Rachael O'Connor, MSNBC Newsweek, 12 Sep. 2025

Moved by its natural character, Michalopoulos vowed to protect Ios from the kind of overdevelopment and overtourism that altered nearby islands. —Caitlin Palumbo, Forbes.com, 11 Sep. 2025

Granados, one of three Texas physicians facing legal action from the state for providing gender-affirming care to adolescents, was not contacted by Paxton’s office before the lawsuit was filed, according to court papers, out of concern that Granados would destroy or alter relevant records. —Brooke Migdon, The Hill, 11 Sep. 2025

Phrases Containing alter

• alter ego