We don't have synonyms for paraboloids yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are paraboloidal and paraboloid.
(n) :
(mathematics) Short for elliptic paraboloid [(mathematics) A surface having parabolic cross sections parallel to an axis and elliptical cross sections perpendicular to the axis; especially the surface of revolution of a parabola.]
(n) :
(mathematics) Short for hyperbolic paraboloid [(mathematics) A surface having parabolic cross sections parallel to an axis and hyperbolic cross sections perpendicular to the axis.]
(n) :
(mathematics) Short for elliptic paraboloid [(mathematics) A surface having parabolic cross sections parallel to an axis and elliptical cross sections perpendicular to the axis; especially the surface of revolution of a parabola.]
(n) :
(mathematics) Short for hyperbolic paraboloid [(mathematics) A surface having parabolic cross sections parallel to an axis and hyperbolic cross sections perpendicular to the axis.]