No it is an adjective.
noxious fumes are dangerous and can kill us
We were all sent home after noxious gases filled our office building. The noxious chemicals caused burning to the skin. He passed out after inhaling noxious fumes.
Noxious
Noxious weed is the umbrella name for a group of weeds that are hazardous to crops, humans and/or habitats. For a list of many of the plants that are classified as noxious weeds, please refer to the related link.
The word "noxious" comes from the Latin word "noxa" meaning injury.
There are some noxious people who clutter up this service by posting their homework questions that they could very well figure out for themselves with a tiny bit of effort.
It is possible that you are thinking of the word noxious, meaning extremely bad or toxic.
fragrance ; noxious ; ephemeral ; nuance ; pulchritudinous ; olfactory.
Noxious and obnoxious all come from noxa.
There's a really noxious smell in my house but I can't figure out where it's coming from.The guy smelled so noxious that he cleared out an entire subway car and had it all to himself.I don't know what I could have eaten that would give me such noxious gas.His wife divorced him because he is a closet racist and she didn't want her children to be exposed to such noxiousbeliefs.
the word were is a LINKING VERB.
The word 'be' is indeed a verb.