mal/male and ben/bene/bon words

Malfeasance

A bad deed that someone with authority (such as a police officer) commited.

Beneficial

A good outcome.

Benediction

A good religious blessing.

Malefactor

A person who does bad deeds.

Beneficiary

A person who gets something good from someone.

Benefactor

A person who offers help or a reward.

Malice

An evil deed or action.

Malady

An illness or sickness.

Malnourished

Bad or horrible health. Very sick.

Malaria

Bad or polluted air.

Benevolent

Caring or kind.

Bonafide

Genuine or real.

Dismal

Having negative feelings or causing negative feelings.

Bon Voyage

Meaning "Have a good trip!" in French.

Bonus

More than what was expected.

Benefit

Something good.

Malignant

Something harmful. Usually used referring to cancer.

Benign

Something that is good.

Malevolent

Used to describe someone evil or mischievous.

Malodorous

Used to describe someone who smells bad.