Synonyms for Overweight (same or very similar meaning)
WordNet sense 1 (the property of excessive fatness):
corpulence, stoutness, adiposisWordNet sense 2 (usually describes a large person who is fat but has a large frame to carry it):
fleshy, heavyWordNet sense 3 (having much flesh (especially fat)):
fatFrom the ODE community, based on WordNetadd/edit