We don't have synonyms for spacelike yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are lacelike, slavelike and saclike.
(adj) :
(physics, of the interval between two events in spacetime) lying outside each other's light cone, so that no information can pass from one to the other
(adj) :
(mathematics, of a four-vector) having a space component of greater magnitude than its time component multiplied by the speed of light
(adj) :
(physics, of the interval between two events in spacetime) lying outside each other's light cone, so that no information can pass from one to the other
(adj) :
(mathematics, of a four-vector) having a space component of greater magnitude than its time component multiplied by the speed of light