1) Big stink 2) Fetor 3) Foetor 4) Foulness 5) Malodour 6) Mephitis 7) Odor 8) Odour 9) Olfactory perception 10) Olfactory sensation 11) Reek 12) Smell 13) Stench 14) Stink 15) Unpleasant smell 1) Fetor 2) Foetor 3) Malodour 4) Niff 5) Pong 6) Reek 7) Stench 8) Stink 
• (n.) An Offensive to the sense of smell; ill-smelling.
Mal·o'dor noun An offensive odor. [ 1913 Webster]
[n] - a distinctive odor that is offensively unpleasant
malodor Smelling unpleasant or offensive.
malodour noun a distinctive odor that is offensively unpleasant