WordNet records no synonym and no antonym for street. It is the only member of each of its synsets, which is common for technical, taxonomic and single-sense vocabulary — there is no other English word that means the same thing. The broader and narrower terms below are the useful relations in that case.
Counts are distinct word forms across every sense. A synonym that appears under three senses is counted once here and shown three times below, under each sense it belongs to.
a thoroughfare (usually including sidewalks) that is lined with buildings
“they walked the streets of the small town”
the part of a thoroughfare between the sidewalks; the part of the thoroughfare on which vehicles travel
“be careful crossing the street”
the streets of a city viewed as a depressed environment in which there is poverty and crime and prostitution and dereliction
“she tried to keep her children off the street”
a situation offering opportunities
“he worked both sides of the street”
people living or working on the same street
“the whole street protested the absence of street lights”
Synonyms, antonyms and the broader and narrower relations for street come from Princeton University’s WordNet. Full sources and licences.