1. EFFUSIVE (ADJECTIVE):Gushing, profuse

Synonyms: lavish, exuberant    

     

Antonyms: economical, unexcited

Example Sentence:

The president was effusive in his grief for the fallen soldiers.

2. GAG (NOUN):Practical joke

Synonyms: hoax, quip      

Antonyms: seriousness, tragedy

Example Sentence:

Don’t gag on such matters.

3. TRANSMOGRIFY (VERB):Convert

Synonyms: alter, mutate     

Antonyms: preserve, stagnate

Example Sentence:

In the play, the actor suddenly transmogrified into a monster.

4. OPINE (VERB):Think

Synonyms: suppose, consider         

Antonyms: calculate, measure

Example Sentence:

She opines a lot even on trivial matters.

 

5. SPECIOUS (ADJECTIVE):Misleading

Synonyms: deceptive, false           

Antonyms: genuine, valid

Example Sentence:

Because it was based on specious information, the study was flawed.

6. DISINGENUOUS (ADJECTIVE):Not straightforward or candid

Synonyms:  unfair, cunning 

        

Antonyms: frank, truthful 

Example Sentence:

He is disingenuous shopkeeper.

7. 
   DERISIVE (ADJECTIVE):Sarcastic

Synonyms: cheeky, mocking    

Antonyms:  praising, respectful

Example Sentence:

He gave a small derisive laugh at the ongoing discussion. 

8. ODIOUS (ADJECTIVE):Extremely unpleasant

Synonyms: disgusting, horrid        

Antonyms:  attractive, delightful

Example Sentence:

The girl said it was the most odious crime she had ever seen.

9. HALCYON (ADJECTIVE): Calm, peaceful

Synonyms: quiet, still   Antonyms:  agitated, loud

Example Sentence:

As I sat in the quiet gardens, I found it easy to relax in such a halcyon setting.

10. RAPACIOUS (ADJECTIVE):Greedy

Synonyms: ravenous, avaricious         

Antonyms:  generous, selfless

Example Sentence:

He is a rapacious lawyer.