No, the word 'ethereal' is an adjective used to describe a noun as extremely delicate and light in a way that seems too perfect for this world; for example an ethereal gown, an ethereal scene.
Freon, DuPont R22 (Dichlorodifluoromethane) is described in the MSDS as having a "slight ethereal" odor. I cannot say that I have noticed any odor from any systems that I have accidentally dumped. Then, again, I don't stick around to sniff it and I have never dumped a system in an enclosed space. If you have ever smelled chloroform, it is also described as having an "ethereal" odor. It is best not to sniff that either.
The ethereal glow of the moonlight illuminated the garden. Her ethereal beauty captivated everyone in the room. The music had an ethereal quality that transported listeners to another world. The mist rising from the lake created an ethereal atmosphere at dawn.
'Ethereal' is an adjective.
"Mushy" is a texture, not an odor. There cannot be a "mushy" odor any more than there can be a "sticky" odor.
Ethereal Tomb was created in 1999.
Ethereal Menace was created in 1999-07.
One example would be : The odor of the skunk was very putrid.
The Ethereal Mirror was created on 1993-02-01.
Ethereal Pleasant's birth name is Kathleen Obrien.
Christian Classics Ethereal Library was created in 1993.
The smell of ethyl acetate is an example of fruity odour.