None of those words is really a euphemism for the others. Odor and scent are general terms applied to any sort of smell, good or bad, although odor may have a somewhat negative connotation; stench and stinkare bad smells.
Your moms tits
some nouns include odor, stench, scent, and smell. adjectives include smell and reek
Fragrance is such a word. Scent and aroma are rather neutral. Names for bad smells include odor, stench, and stink.
smell scent stink
A stink refers to a highly offensive smell. Some of its synonyms are stench, foul odor, fetor, malodor and noisomeness.
Another word for unpleasant is displeasing.
Fumes, pollution, stench, stink, vapour
Stink, reek, disgusting odor, unpleasant smell
No, they don't stink, but the males have a distinctive musky scent.
Stink means a really, really bad odor. It means something or someone smells really bad.
scent
Smells/Smelly Stench Odor Reek P.U./Pew Foul