Here are a few verses which use this word:
B'reisheet (Genesis) 6:11: "The earth was ruined to the face of Elohim, and the earth was filled with chamas: violence." וַתִּשָּׁחֵת הָאָרֶץ, לִפְנֵי הָאֱלֹהִים; וַתִּמָּלֵא הָאָרֶץ, חָמָס
The context is HaShem is explaining why the world needed to be destroyed by the great flood. The world was filled with chamas!!
Another scripture also from B'reisheet: 49:5 " Shimon and Levi brothers--vessels of chamas, violence, are their weapons."
שִׁמְעוֹן וְלֵוִי, אַחִים--כְּלֵי חָמָס, מְכֵרֹתֵיהֶם
Their own father used this terminology in his final blessings/prophecies over his sons. He was referring to how they had slain all the male inhabitants of Shechem in retaliation of the rape of their sister, Dinah.
One more from David's song glorifying HaShem for deliverance from Sha'ul in Sh'muel bet (2 Samuel) 22:49, which says at the end of the verse: "from men of chamasim [plural form] you will rescue me!"
מֵאִישׁ חֲמָסִים, תַּצִּילֵנִי
You may look up all the verses just in the book of Mishlei (Proverbs) in 3:31, 4:17, 10: 6, 10:11, 13:2, 16:29 and 26:6. I found them just by looking in Strong's for occurrences of the word listed. See also this link: http://biblesuite.com/hebrew/2555.htm
Let us seek the opposite of חמס: