macadam vs tarmac

macadam and tarmac both are nouns.

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

As nouns, macadam and tarmac are synonyms defined as:

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

Other synonyms of macadam include tarmacadam.

As verbs, macadam and tarmac are synonyms defined as:

Other synonyms of macadam include macadamise, macadamize.

macadam (noun)	tarmac (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
broken stone used in macadamized roadways	a paving material of tar and broken stone; mixed in a factory and shaped during paving

macadam (verb)	tarmac (verb)
surface with macadam	surface with macadam