When using this command,
/give @p diamond_axe 1 0 {ench:[

{id:16,lvl:6}

],display:

{Lore:["Secret Weapon"]}

,AttributeModifiers:[

{Operation:0,UUIDLeast:1,UUIDMost:1,AttributeName:generic.attackDamage,Amount:14.25,Name:attack1}

,

{Operation:1,UUIDLeast:1,UUIDMost:1,AttributeName:generic.movementSpeed,Amount:0.46,Name:speed1}

]}

The diamond axe given should have only dealt 14.25 damage on a mob (Villager), but kills the Villager in one shot of the axe. When removing the "ench" part, it will deal the normal amount of health it should have dealt without the sharpness.

/give @p diamond_axe 1 0 {ench:[],display:

{Lore:["Secret Weapon"]}

,AttributeModifiers:[

{Operation:0,UUIDLeast:1,UUIDMost:1,AttributeName:generic.attackDamage,Amount:14.25,Name:attack1}

,

{Operation:1,UUIDLeast:1,UUIDMost:1,AttributeName:generic.movementSpeed,Amount:0.46,Name:speed1}

]}