Yes, depending on the type of wall.
Rūpēs, -is is a third-declension feminine noun derived from rumpō "break, split". It means a rock which is split apart or has a smooth face; I've seen it translated as "cliff", "canyon", or just plain "rock" (e.g. rūpēs Tarpeia is "the Tarpeian Rock").
Rectus, -a, -um started as the past participle of regō "to keep straight". Eventually rectus became more popular than regō, so it's often analyzed as an independent adjective meaning "straight, perpendicular, horizontal; correct, accurate, proper". Compare English "rectify", "correct", "rectangle".
From the looks of it, the Rūpēs Recta on the moon is definitely a smooth rock face, and is definitely (kind of) straight, so the name seems appropriate.