For free and Toll-free

For free adverb - Without payment.

Toll-free and for free are semantically related. In some cases you can use "Toll-free" instead an adverb phrase "For free".

Toll-free adjective - Having no toll levied for its use.

For free and toll-free are semantically related. Sometimes you can use "For free" instead an adverb phrase "Toll-free".