sandpit vs sandbox

sandpit and sandbox both are nouns.

Word	Noun	Adjective	Verb	Adverb
sandpit	Yes	No	No	No
sandbox	Yes	No	No	No

As nouns, sandpit and sandbox are synonyms defined as:

sandpit and sandbox: a plaything consisting of a pile of sand or a box filled with sand for children to play in

Other synonyms of sandpit include sandpile.

sandpit (noun)	sandbox (noun)
a plaything consisting of a pile of sand or a box filled with sand for children to play in	a plaything consisting of a pile of sand or a box filled with sand for children to play in
a large pit in sandy ground from which sand is dug	mold consisting of a box with sand shaped to mold metal