Veteran = a person who has had long experience in any particular field

Genius = an exceptionally intelligent person or one with exceptional skill in a particular area of activity

Seasoned = having a lot of experience of doing something and therefore knowing how to do it well

Ambidextrous = someone who is able to use both hands equally well

So, the correct answer is "Veteran".

Epithet=  a characterizing word or phrase accompanying or occurring in place of the name of a person or thing

Epigraph= an inscription on a building, statue, or coin

Soliloquy= the act of talking to oneself

Epitaph= an inscription on or at a tomb or a grave in memory of the one buried there

Hence, the correct answer is "Epitaph".

Devious= showing a skillful use of underhand tactics to achieve goals

Nefarious= wicked or criminal

Surreptitious= kept secret, especially because it would not be approved of, stealthy 

Villainous= having a cruel, wicked, malicious nature or character

So, the correct answer is "Surreptitious".

Desolate= (Adjective) (of a place) uninhabited and giving an impression of bleak emptiness; barren

Absolute= viewed or existing independently and not in relation to other things; not relative or comparative; total

Obsolete=no longer produced or used; out of date

Primitive = relating to, denoting, or preserving the character of an early stage in the evolutionary or historical development of something

So, the correct answer is "Obsolete".

Amoral: lacking a moral sense; unconcerned with the rightness or wrongness of something

Immoral: not moral and connotes evil or licentious behavior

Immortal:living forever; never dying or decaying

Biography: Life history of a person written by some other person

Autobiography: Life history of a person written by himself/herself

So, the correct answer is "Biography".

Migration=seasonal movement of animals from one region to another

Emigration=the act of leaving one's own country to settle permanently in another; moving abroad

Immigration= the action of coming to live permanently in a foreign country

Exodus= Large scale departure of people

So, the correct answer is "Exodus".

Debtor=a person, country, or organization that owes money

Glazier=a person whose trade is fitting glass into windows and doors

Inscrutable= impossible to understand or interpret

Insolvent= unable to pay debts owed

So, the correct answer is "insolvent".

Harangue= a lengthy and aggressive speech

Lapidist= someone skilled in working with precious stones

Misogynist= one who dislike women

Panacea= a solution or remedy for all difficulties or diseases

Credulous= willing to believe or trust too readily, especially without proper or adequate evidence

Innocent= a pure, guileless, or naive person

Coleopterist= a person who studies or collects beetles

Malcontent= a person who is dissatisfied and rebellious

So, the correct answer is "Credulous".