paste, paced

Paste or paste means a mixture for sticking paper together--
Now paste the letters to the poster, and we'll have a nice sign.
The children always want to eat the paste; make sure it's nontoxic.

Paste may also mean a smooth soft dough or mixture--
You'll need some almond paste to make this recipe.
This is seasoned with a kind of fish paste you can buy in an Asian market.

Paced or paced ( rhymes with paste ) is the past tense ( yesterday, or some time ago ) of "pace", meaning to walk back and forth--
He couldn't sleep, and paced the floor all night.
He paced back and forth, agitated.

Paced may also be the past tense of "pace", meaning to set the rate of movement; the gait, literally or figuratively--
The horse, an unknown, paced the mile in record time.
He could have finished the job if he had paced himself.

Now that you know that, you can say--
"He paced up and down, and knocked over a jar of paste and a glass of water."