Synonyms for Ill-smelling (same or very similar meaning)
WordNet sense 1 (smelling of fermentation or staleness):
rancidWordNet sense 2 ((used of the smell of meat) smelling spoiled or tainted):
gamyWordNet sense 3 (offensively malodorous):
fetid, foul, noisome, stinkingWordNet sense 4 (having an unpleasant smell):
malodorous, unpeasant-smellingFrom the ODE community, based on WordNetadd/edit