One word substitution

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Choose the alternative which can be substituted for the given words/sentence.

A person who makes a scientific study of birds.
Ornithologist
no
Orthodontist
yes
Anaesthetist
no
Astrophysicist
no
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A frog lives both on land as well as in water
Amphibian
yes
Aquatic
no
Ambidextrous
no
Animate
no
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A strong dislike
Entreaty
no
Animosity
yes
Malice
no
Reciprocity
no
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A person in a vehicle or on horseback escorting another vehicle
Navigator
no
Escort
no
Outrider
yes
Security
no
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Prohibited by law or treaty from being imported or exported
Contraband
yes
Smuggled
no
Counterfeit
no
Forged
no
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One who is unaffected or indifferent to joy, pain, pleasure or grief.

Tolerant
no
Resigned
no
Passive
no
Stoic
yes
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