I would also say I can picture a smell, but maybe “imagine” is a better word.

Synesthesia is any kind of crossing of senses. I had a friend in college who had synesthesia for colors and smells and shapes (I apparently smell like a purple and orange blobby shape) but she also had these weird ways of visualizing time that was also in a similar vein. It’s pretty complex and multifaceted.

Edit: This thread is delightfully full of giddy 90s trolls who are goofing on absolutely everything.