1. MENDACITY(NOUN): insincerity

Synonyms: deceit, deception           Antonyms: honesty, truthfulness

Example Sentence: 

He is full of mendacity.

 

2. MERCURIAL (ADJECTIVE):temperamental

Synonyms: erratic, impulsive        Antonyms: steady, tranquil

Example Sentence:

I don’t like his mercurial behaviour.

3. PROMULGATE (VERB): make known

Synonyms: declare, notify                Antonyms: hide, suppress

Example Sentence:

He promulgated Ravi as his son before everyone.

4. PROMISCUOUS (ADJECTIVE): immoral

Synonyms: profligate, wanton               Antonyms: careful, moral

Example Sentence: 

Cheating on someone is a promiscuous deed.

5. OCCULT (ADJECTIVE):mysterious

Synonyms: concealed, hidden      Antonyms: clear, exposed

Example Sentence: 

It is considered as an occult document.

6. OBSEQUIOUS(ADJECTIVE): grovelling

Synonyms: complacent, compliable      Antonyms: arrogant, presumptuous

Example Sentence:

He does everything with obsequious nature.

7. OBNOXIOUS (ADJECTIVE):offensive

Synonyms: annoying, hateful             Antonyms: decent, pleasant

Example Sentence: 

Touching someone without prior consent is an obnoxious deed.

8. MURKY (ADJECTIVE): gloomy

Synonyms: dark, dreary        Antonyms: bright, cheerful

Example Sentence:

He is in murky mood these days.

9. MUTINOUS (ADJECTIVE): rebellious

Synonyms: anarchistic, defiant        Antonyms: compliant, obedient

Example Sentence: 

This man has been mutinous leader throughout his life.

10. NASTY (ADJECTIVE): awful

Synonyms: unpleasant, disgusting    Antonyms: good, nice

Example Sentence: 

 

This room is filled with nasty smell.