We don't have synonyms for soft landed yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are soft-landed, soft land and soft lands.
(v) :
Alternative form of soft-land. [(transitive, intransitive, astronautics, aviation) To land (a vehicle or other payload) on the surface of a body in such a manner that it survives the landing mostly or entirely intact and is usable or able to operate, at least briefly, following touchdown.]
(v) :
Alternative form of soft-land. [(transitive, intransitive, astronautics, aviation) To land (a vehicle or other payload) on the surface of a body in such a manner that it survives the landing mostly or entirely intact and is usable or able to operate, at least briefly, following touchdown.]