tarmacadam vs pavement

tarmacadam and pavement both are nouns.

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

As nouns, pavement is a hypernym of tarmacadam; that is, pavement is a word with a broader meaning than tarmacadam:

tarmacadam: a paving material of tar and broken stone; mixed in a factory and shaped during paving
pavement: material used to pave an area

Other hypernyms of tarmacadam include paving, paving material.

tarmacadam (noun)	pavement (noun)
a paved surface having compressed layers of broken rocks held together with tar	the paved surface of a thoroughfare
a paving material of tar and broken stone; mixed in a factory and shaped during paving	walk consisting of a paved area for pedestrians; usually beside a street or roadway
	material used to pave an area