sword of the spirit -vs- sword of bitterness

Psalm 64:2-4 - Hide me from the secret counsel of the wicked; from the insurrection of the workers of iniquity: who whet their tongue like a sword, and bend their bows to shoot their arrows, even bitter words: that they may shoot in secret at the perfect:

Proverbs 5:3-4 - For the lips of a strange woman drop as an honeycomb, and her mouth is smoother than oil: but her end is bitter as wormwood, sharp as a twoedged sword.

Ephesians 6:17 - For the word of God is quick, and powerful, and sharper than any twoedged sword, piercing even to the dividing asunder of soul and spirit, and of the joints and marrow, and is a discerner of the thoughts and intents of the heart.

Hebrews 4:12 - And take the helmet of salvation, and the sword of the Spirit, which is the word of God: