* Starting with "S":
* sarcasm
* arms
* cars
* cast
* scar
* scam
* scam
* sac
* mas
* ram
* mars
* cans
* san
* Starting with "A":
* arms
* cars
* as
* as
* Starting with "R":
* arms
* cars
* ram
* ras
* Starting with "C":
* cars
* cast
* cans
* Starting with "M":
* mars
* mas
* ram
This is not an exhaustive list, and there might be more words depending on how you define "words" (e.g., if you allow proper nouns or words with special characters).
Let me know if you'd like to try this with another word!