Words whose sound and meaning are connected

I’ve been thinking about words we sometimes use that seem to convey their meaning by the way they sound when spoken. Words like:

• Blotchy
• Gruel
• Spastic
• Sibilant
• Amok
• Moist
• Grunt
• Twinkle

These are not quite the same as onomatopoeia. I’m sure there is a formal term for them but I can’t think of it right now. I just think they are interesting to contemplate. Often, we use such words without thinking about them in this way.

Do you have any words like this that you can think of?