Find Synonyms

grownup Synonyms

Another word for grownup

Choosing another word for grownup depends on context, so the 12 synonyms and similar words below are separated across 3 exact definitions and ranked by match strength.
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• noun (Context 1)

A physically mature person; an adult (used especially by or in relation to children).

Usage Example

"The children sat at the small table in the kitchen while the grownups talked in the dining room."

Strongest
grown-up
adult

• adjective (Context 2)

Fully developed and physically mature; having reached adulthood.

Usage Example

"Their two grown-up children now live in different cities and have careers of their own."

Strongest
grown-up
adult
grown
full-grown
fully-grown
mature
Strong
of age

• adjective (Context 3)

Characteristic of, suitable for, or behaving like a sensible, responsible adult rather than a child.

Usage Example

"Negotiating a peaceful compromise was a very grown-up way to handle the disagreement."

Strongest
grown-up
mature
adult
Strong
responsible
sensible
reasonable
levelheaded
sophisticated

Opposites of grownup

The opposite of grownup shifts depending on context. Common opposites include:

child
childish
immature
kid
juvenile
young
minor
infantile
See all opposites of grownup

• Nearby Words

growl
growler
growly
grownup
growth
grr
grub

Cite this Entry

Wordmom. (2026). Synonyms for Grownup. In Wordmom Thesaurus. Retrieved Nov 5, 2026, from https://wordmom.com/synonyms/grownup
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