We don't have synonyms for side wall yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are sidewalk, sidewall and fire wall.
(n) :
(squash, racquetball) Either of the two parallel walls in a court, perpendicular to the front wall; either of the walls on the side of the court.
(n) :
Used other than figuratively or idiomatically: see side, wall.
(n) :
(squash, racquetball) Either of the two parallel walls in a court, perpendicular to the front wall; either of the walls on the side of the court.
(n) :
Used other than figuratively or idiomatically: see side, wall.