Antonym, Synonym and Hyponym

 Synonym

A synonym is a word that means exactly the same as, or very nearly the same as, another word in the same language. For example, "close" is a synonym of "shut".

  Organization, institution, management

  Partner, associate, colleague, companion

  Polite, courteous, cordial, gracious

  Risky, dangerous, perilous, treacherous

  Sleepy, drowsy, listless, sluggish

  Vacant, empty, deserted, uninhabited

Antonym

An antonym is a word that means the opposite of another word. For example "bad" is an antonym of "good". Here are some more examples:

Antonym Examples

• Achieve – Fail
• Idle – Active
• Afraid – Confident
• Ancient – Modern
• Arrive – Depart
• Arrogant – Humble
• Ascend – Descend
• Attack – Defend
• Blunt – Sharp
• Brave – Cowardly
• Cautious – Careless
• Complex – Simple

Hyponym

 

Hyponymy shows the relationship between the more general terms (hypernyms) and the more specific instances of it (hyponyms). A hyponym is a word or phrase whose semantic field is more specific than its hypernym. The semantic field of a hypernym, also known as a superordinate, is broader than that of a hyponym

"Hyponymy is a less familiar term to most people than either synonymy or antonymy, but it refers to a much more important sense relation. It describes what happens when we say 'An X is a kind of Y'--A daffodil is a kind of flower, or simply, A daffodil is a flower."
(David Crystal, The Cambridge Encyclopedia of the English Language, 2nd ed. Cambridge University Press, 2003)

http://examples.yourdictionary.com/examples-of-antonyms-synonyms-and-homonyms.html#cJ64DTRxGOcuOgQb.99

http://grammar.about.com/od/fh/g/hyponymterm.htm

https://en.wikipedia.org/wiki/Hyponymy_and_hypernymy

https://www.englishclub.com/vocabulary/synonyms-antonyms.htm