These are homophones. These words  are pronounced exactly the same way,  

different spellings and  different meanings. We have  

stalk which is a stem and stock which are goods  shares in a business or the liquid base of a soup.

To say these words correctly we have four sounds.  Let's start with the s. sss To do this sound  

tip of the tongue is either down towards the  bottom of the mouth, the tip of the tongue,  

or behind the top front teeth.  It's not touching the teeth.  

Air is going to continuously  move out of the mouth - sssss.  

Then you're going to touch the tip of the tongue  to the back of the top front teeth for that sss t

Then we're going to move to that open oh.  

Wide open oval mouth, tip of the tongue  is down, back of the tongue is pulled up.

And then we're going to end with the k.  

Again tip of the tongue is down back of the tongue  is pulled up and the mouth is open. Air puffs out.

Let's put it all together: s talk 

stock stock stock stalk stalk stalk

And now for a sentence:

The corn stalk does not make good vegetable stock.

Give it a try people are going to  notice the difference! If you found  

this helpful please share us with  your friends and give us a like.  

If you need more help we have products  and classes listed at Tarle speech.

Thanks so much everyone have an amazing week!