We don't have synonyms for leans yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are lean, means and lens.
(n) :
(aviation, with the) A dangerous sensory illusion where the pilot of an aircraft believes themselves to be in a bank when they are actually wings-level, or vice-versa, often resulting in spatial disorientation and loss of control of the aircraft.
(n) :
(aviation, with the) A dangerous sensory illusion where the pilot of an aircraft believes themselves to be in a bank when they are actually wings-level, or vice-versa, often resulting in spatial disorientation and loss of control of the aircraft.