Synonyms for "solid"

3 kid-friendly synonyms for solid, sorted by grade level (K-2, 3-5, 6-8).

What does "solid" mean?

The word solid is a noun that means: matter that holds its shape, like a rock or a block of wood.

Example: "Ice is a solid."

Grade 3–5Stronger words for solid

For elementary writers ready to add precision and variety to their vocabulary:

Grade 6–8Middle-school vocabulary for solid

Tier 2 academic alternatives — useful for essays, persuasive writing, and standardized tests:

Opposites of solid (antonyms)

Words that mean the opposite of solid:

See the full solid antonyms page →

FAQ — synonyms for solid

What is a good synonym for solid in a kid's writing?
For K-2 writers, try firm. For older students, "firm" reads more naturally in school writing.
How many synonyms does solid have?
We list 3 grade-appropriate synonyms for solid across three reading levels. Adults' thesauruses include dozens more, but most aren't useful for K-8 vocabulary.
Is solid a noun, verb, or adjective?
In this entry, solid is used as a noun.

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