New Testament Hyper-concordance: "Bitterness"

Acts.8.23	For I see that you are in the gall of bitterness and in the bond of iniquity."
Rom.3.14	"Their mouth is full of curses and bitterness."
Eph.4.31	Let all bitterness and wrath and anger and clamor and slander be put away from you, with all malice,
Heb.12.15	See to it that no one fail to obtain the grace of God; that no "root of bitterness" spring up and cause trouble, and by it the many become defiled;