One word substitute is Imposter.

Imposter: a person who pretends to be someone else in order to deceive others, especially for fraudulent gain.
Liar: a person who tells lies.
Rogue: a dishonest or unprincipled man.
Magician: a person with magical powers.

One word substitution is Linguist.

Linguist: a person skilled in foreign languages.
Grammarian: a person who studies and writes about grammar.
Polyglot: knowing or using several languages.
Bilingual: speaking two languages fluently.

One word substitution is Cynic.
Egoist: a self-centered or selfish person
Fatalist: one who accepts all things and events as inevitable.
Stoic: a person who can endure pain or hardship without showing their feelings or complaining.
Cynic: a person who believes that people are motivated purely by self-interest rather than acting for honourable or unselfish reasons.

One word substitution is Versatile.

Versatile: able to adapt or be adapted to many different functions or activities.
Nubile: sexually mature; old enough for marriage.
Exceptional: unusually good; outstanding.
Gifted: having exceptional talent or natural ability.
 

Epitome: a person or thing that is a perfect example of a particular quality or type.
Epistle: a letter.
Epilogue: a section or speech at the end of a book or play that serves as a comment on or a conclusion to what has happened.
Epitaph: a phrase or form of words written in memory of a person who has died, especially as an inscription on a tombstone.
 

Explanation : One word substitute is Omnivorous.

Omnipotent: (of a deity) having unlimited power.
Insolvent: unable to pay debts owed.
Omniscient: knowing everything.
Omnivorous: (of an animal or person) feeding on a variety of food of both plant and animal origin.

Malafide case is one which is undertaken in a bad faith.

Polygyny: polygamy in which a man has more than one wife.
Polyphony: the style of simultaneously combining a number of parts, each forming an individual melody and harmonizing with each other.
Polyandry: polygamy in which a woman has more than one husband.
Polychromy: the art of painting in several colours, especially as applied to ancient pottery, sculpture, and architecture.

One word substitution is Centrifugal.

Centrifugal: moving or tending to move away from a centre.
Centripetal: moving or tending to move towards a centre.
Axiomatic: self-evident or unquestionable.
Awry: away from the usual or expected course
 

Teetotaller means a person who never drinks alcohol.