1. PERFIDIOUS (ADJECTIVE): Treacherous

Synonyms: insidious, betraying   

               

Antonyms: honest, reliable

Example Sentence: Madan proved to be a perfidious member of their family.

2. BITER (NOUN):kid 

Synonyms: boy, youngster   

             

Antonyms: adult, senior-citizen 

Example Sentence: A naughty biter broke the toy.

3. MASQUERADE (NOUN): disguise

Synonyms: carnival, domino                

Antonyms: openness, reality

Example Sentence: His genuine personality was hidden behind the fake masquerade.

4. STENTORIAN (ADJECTIVE):very loud 

Synonyms: resounding, blaring                  

Antonyms: soft, low 

Example Sentence: His cry of despair at his father’s death was stentorian.

5. EXPURGATE (VERB):Censor

Synonyms: bleep, purge                       

Antonyms: protect, construct

Example Sentence: The committee expurgated the film.

6. ACQUAINTANCESHIP (NOUN):friendship

Synonyms: partnership, cooperation      

Antonyms: aloofness, rivalry

Example Sentence: There is an intense acquaintanceship between both of them.

7. SHEENY (ADJECTIVE):bright

Synonyms: polished, lustrous               

Antonyms: dull, unpolished

Example Sentence: It was a sheeny night.

8. MUCRONATE (ADJECTIVE): pointed 

Synonyms: sharp, barbed                          

Antonyms: fluffy, blunt

Example Sentence: He charged a mucronate knife at me.

9. NEGATORY (NOUN):contradiction

Synonyms: denial, nullity                       

Antonyms: allowance, approval

Example Sentence: A sign of  tiny negatory has been seen in an agreement.

10. INDUCT (VERB):Conscript

Synonyms: enlist, inaugurate                    

Antonyms: close, end

Example Sentence: Maya inducted him into her business.