Tremors is the name of the Graboid, Shrieker and Assblaster species as a whole.

Consider this my Steven Moffat version of the Doctor's name because this is totally something I would make canon if I could.

It's easy enough. Expanding off Jodi and Walter Chang's reasoning for naming Assblaster and Graboid, we can assume someone will want to classify them all in the future under an umbrella term so people can better latch onto the name for in-universe licensing rights. Something catchy that works easier than the genus nomenclature of Caedarus Afrikaans/Americana/Mexicana.

Whoever it is, they come up with the term "Tremors" to do so. After the way the creatures shake the ground, tear things up, blast their ass and leave you with.... Tremors. 😘🤓😘

Hopefully it works like the rest do.

Cause Universal stole Tremors and we need to get it back to Stampede Entertainment after what Universal did to #BurtGummerDay.