A noxious smell gives away a colony of Magellanic penguins.

Van Lutyens, however, believes she was deliberately trapped, and recalls the noxious smell in the room by the time they arrived.

The noxious smell from her poultices filled the room, making Reed sick to his stomach.

Devil's dung (also considered to have a highly noxious smell)

I was even willing to overlook the noxious smell of ammonia wafting up from the subterranean bathrooms.

Something with a certain noxious smell, like pesticides, fertilizer or perhaps some toxic blend of the two.

The motor cut suddenly, with a loud discharge from its exhaust tubes which blew back a noxious smell.

There is also a fish canning factory, mostly known for its noxious smell.

It was the smell of rot and decomposition, high and noxious.

He wore a breathing mask because the stench of a decomposing human body was perhaps the most noxious smell another human could be exposed to.