stench
a strong unpleasant smell
reeking
smell strongly and unpleasantly; stink.
exquisite
lovely, excellent
fragrant
pleasant smelling
whiff
smell that is only smelt briefly or faintly.
musty
having a stale, mouldy, or damp smell
noxious
harmful, poisonous, or very unpleasant.
tantalizing
exciting one's senses
rancid
highly unpleasant
aroma
a distinctive, typically pleasant smell.