Similar in sound and meaning:
* Chillingly (adverb)
* Chilly (adjective)
* Chill (noun, verb)
* Chilled (adjective)
Similar in sound, different meaning:
* Ceiling (noun)
* Chewing (verb)
* Churning (verb)
* Chiling (misspelling)
Rhyming words:
* Drilling
* Felling
* Killing
* Spilling
* Thrilling
* Willing
The best choice for you will depend on the specific context you're looking for.