Defo, you can say that sth is SMELLY or STINKY when it has an unpleasant smell. STINKY is stronger than SMELLY.
(Every time I hear “SMELLY” the only image comes to my mind: Phoebe’s song “Smelly Cat”…. If you’ve watched “FRIENDS” you have this song in your head now).
·I’ll never return to this place. It’s SMELLY and noisy.
·I’ve no idea how you can eat this STINKY fish.