Onomatopoeia is the word that goes with a sound affect like "meow" of "honk".

Here are a few more examples:
Onomatopoeia.jpg
When makeing this, Create Outlines not only let me squish Thud, but also let me split Slice and Chomp. I used Warp options to alter Swoosh and Boom, but I added a centered and extra blurry drop shadow for Boom also.