tarmacadam vs macadam

tarmacadam and macadam both are nouns.

Word	Noun	Adjective	Verb	Adverb
tarmacadam	Yes	No	No	No
macadam	Yes	No	Yes	No

As nouns, tarmacadam and macadam are synonyms defined as:

tarmacadam and macadam: a paved surface having compressed layers of broken rocks held together with tar

Other synonyms of tarmacadam include tarmac.

tarmacadam (noun)	macadam (noun)
a paved surface having compressed layers of broken rocks held together with tar	a paved surface having compressed layers of broken rocks held together with tar
a paving material of tar and broken stone; mixed in a factory and shaped during paving	broken stone used in macadamized roadways

tarmacadam (verb)	macadam (verb)
	surface with macadam