In this study, we performed a novel synthesis of one-dimensional (1-D) SmCo/FeCo core-shell nanomagnets with noticeably enhanced exchange-coupling interactions via electrospinning and a subsequent heat treatment process coupled with an electroless plating process. We discuss the influence of the 1-D shape in enhancing the magnetic properties, particularly exchange-coupling interactions of the rare-earth magnet, compared to the zero-dimensional (0-D) core-shell magnet. With the advent of high-efficiency miniaturized devices in modern industry, there is high demand for enhanced permanent magnets. Their applications are wide-ranging and include motors in automobiles, data storage devices, electromechanical devices, and electronics. Theoretically, one way to improve the inherent magnetic properties of rare-earth nanomagnets (i.e., SmCo) is to fabricate a soft magnet (i.e., FeCo)-coated core-shell nanomagnet that participates in exchange-coupling interaction with the interphase. However, many previous reports showed only marginal enhancement in magnetic properties, ascribed to the inevitable tendency of 0-D nanoparticles to agglomerate, resulting in non-ideal magnetic coupling. Moreover, there have been no reports on SmCo-based core-shell nanoscale magnets with a 1-D structure, and the effect of magnet shape on the magnetic properties (particularly on exchange-coupling effect) is not well understood. In this regard, such a comparison is a meaningful approach in the design of permanent magnets for achieving effective magnetic coupling. We clarified the distinct effect of magnet shape based on the analytical results. Interestingly, despite the tailored thickness of the FeCo layer on the Sm2Co17, there was no increase in magnetization or (BH)max enhancement in 0-D magnets, resulting from agglomeration, while 1-D magnets showed an all-time high effective exchange-coupling interaction. Substantial enhancement in magnetization and a (BH)max value of about 10.14 MG·Oe were obtained in the 1-D nanostructure, representing straightforward enhancement of greater than 145% compared to 0-D magnetic nanostructures. Our work also elucidates the magnetic behavior within the hard-soft magnetic phases of the 1-D SmCo/FeCo nanocomposite, including a comparison with the 0-D bi-magnet. We expect that this understanding can be extended to synthesis of a super-strong exchange-coupled magnet, overcoming the limitations of traditional magnetic materials. Moreover, the present work would be of particular interest to researchers working on a broad range of syntheses and advanced magnetic devices. Figure 1