WordNet sense 1 (smelling of fermentation or staleness):

rancid

WordNet sense 2 (giving off a strong unpleasant smell):

reeking

WordNet sense 3 (of noxious stench from atmospheric pollution):

mephitic

WordNet sense 4 ((used of the smell of meat) smelling spoiled or tainted):

high

WordNet sense 5 (offensively malodorous):

fetid, foul, funky, noisome, smelly, stinking, foul-smelling

WordNet sense 6 (having an unpleasant smell):

stinky, malodourous, ill-smelling, unpeasant-smelling