prem
cost 'em
complete deplete
be dumb cede em heed em need em peed, um...
decorumrumfor 'em
gattin' 'em
zappin em
Inhale 'em
Made em
There are no perfect rhymes for the word scrotum.
Theorem, smear 'em, steer some.
Fold 'em (thank you, Kenny Rogers! "You got to know when to hold 'em, know when to fold 'em, know when to walk away, and know when to run.")
Em. (Short for Emily) Jem, such as the boy from "To Kill A Mockingbird."