pavement vs sidewalk

pavement and sidewalk both are nouns.

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

As nouns, pavement and sidewalk are synonyms defined as:

pavement and sidewalk: walk consisting of a paved area for pedestrians; usually beside a street or roadway

pavement (noun)	sidewalk (noun)
the paved surface of a thoroughfare	walk consisting of a paved area for pedestrians; usually beside a street or roadway
walk consisting of a paved area for pedestrians; usually beside a street or roadway
material used to pave an area