dysentry
today
no, he died of a sickness
witless, witness, sickness,
Chicken pocks
sickness happiness dress
quickness sickness
germ
javelin, swimming, boxing etc. (any sport ending in ing.)
The word "term" can rhyme with "squirm" and is often associated with a duration or period, but it doesn't directly mean to cause sickness. However, "germ" is a better fit, as it refers to microorganisms that can cause illness. If you're looking for something that rhymes and fits the context, "germ" would be the ideal choice.
Ian Lynn Quinn Steven Boston Jayden Melvin Hayden Nathan Ashlynn
princess, incest, pinheads, sickness, fish nets,
The cast of Rhymes with Syringe - 2011 includes: Jason Axe as Bruce Katelyn Bowyer as Melanie Lynn Crecelius as Derek Todd Haberkorn as Terry Ruby Leigh Young as Dana