Boon vs. Bane

Boon and Bane Definitions
Boon
Something that provides a benefit or an advantage
A brisk breeze is a boon to sailors.
Bane
A cause of harm, ruin, or death
"Obedience, / Bane of all genius, virtue, freedom, truth, / Makes slaves of men" (Percy Bysshe Shelley).
Boon
Convivial; jolly
A boon companion to all.
Bane
A source of persistent annoyance or exasperation
"The spellings of foreign names are often the bane of busy copy editors" (Norm Goldstein).
Boon
(Archaic) Favorable.
Bane
Fatal injury or ruin
"Hath some fond lover tic'd thee to thy bane?" (George Herbert).
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Boon
(obsolete) A prayer; petition.
Bane
A deadly poison.
Boon
(archaic) That which is asked or granted as a benefit or favor; a gift or benefaction.
Bane
A cause of misery or death.
The bane of one's existence
Boon
A good thing; a blessing or benefit; a thing to be thankful for.
Finding the dry cave was a boon to the weary travellers.
Anaesthetics are a great boon to modern surgery.
Bane
(dated) Poison, especially any of several poisonous plants.
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Boon
An unpaid service due by a tenant to his lord.
Bane
(obsolete) A killer, murderer, slayer.
Boon
The woody portion of flax, separated from the fiber as refuse matter by retting, braking, and scutching.
Bane
(obsolete) Destruction; death.
Boon
(obsolete) Good; prosperous.
Bane
A disease of sheep.
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Boon
(archaic) Kind; bountiful; benign.
Bane
(transitive) To kill, especially by poison; to be the poison of.
Boon
(now only in boon companion) gay; merry; jovial; convivial.
Bane
(transitive) To be the bane of.
Boon
A prayer or petition.
For which to God he made so many an idle boon.
Bane
That which destroys life, esp. poison of a deadly quality.
Boon
That which is asked or granted as a benefit or favor; a gift; a benefaction; a grant; a present.
Every good gift and every perfect boon is from above.
Bane
Destruction; death.
The cup of deception spiced and tempered to their bane.
Boon
The woody portion flax, which is separated from the fiber as refuse matter by retting, braking, and scutching.
Bane
Any cause of ruin, or lasting injury; harm; woe.
Money, thou bane of bliss, and source of woe.
Boon
Good; prosperous; as, boon voyage.
Bane
A disease in sheep, commonly termed the rot.
Boon
Kind; bountiful; benign.
Which . . . Nature boonPoured forth profuse on hill, and dale, and plain.
Bane
To be the bane of; to ruin.
Boon
Gay; merry; jovial; convivial.
A boon companion, loving his bottle.
Bane
Something causes misery or death;
The bane of my life
Boon
A desirable state;
Enjoy the blessings of peace
A spanking breeze is a boon to sailors
Boon
Very close and convivial;
Boon companions