1. RUE (VERB): Regret 

Synonyms: mourn, apologize                  

Antonyms: be happy, delight

Example Sentence:

It’s no use rueing over waste money.

 

2. RUMINATE (VERB): Think about seriously 

Synonyms: meditate, cogitate                   

Antonyms: ignore, neglect

Example Sentence: His sudden death made us all ruminate on the true value of time.

3. CAULK (VERB): Secure

Synonyms: block, barricade                 

Antonyms: loosen, free

Example Sentence: He caulked his garden with thorns.

4. EXPIATE (VERB): Absolve

Synonyms: amend, correct                 

Antonyms: blame, forfeit 

Example Sentence:  As soon as he realized his mistake he expiated it.

5. MERCANTILE (ADJECTIVE): Regarding business

Synonyms: trade, monetary         

Antonyms:  non-commercial, not-for-profit

Example Sentence: They had a word regarding mercantile plan.

6. COLTISH (ADJECTIVE): Full of spirit

Synonyms: lively, playful            

Antonyms:  depressed, down 

Example Sentence: My coach is a coltish man.

7. CLEMENCY (NOUN): Forgiveness

Synonyms: compassion, indulgence                

Antonyms: meanness, cruelty

Example Sentence: The saint kept on showing his clemency towards a biting venomous scorpio.

8. AFFORESTATION (NOUN): Forest management 

Synonyms: forestation, arboriculture      

Antonyms: deforestation, erosion

Example Sentence: Dr Tejas Sinha, the wild forest officer, was good at afforestation.

9. PECKISH (ADJECTIVE): Deprived of food

Synonyms: hungry, craving                      

Antonyms: fed, satisfied

Example Sentence: Those peckish children of Sudan were very happy getting food packets.

10. PANTHEIST (NOUN): Unbeliever

Synonyms: agnostic, freethinker   

Antonyms:  believer, monotheistic

Example Sentence: Manju is obviously a diehard pantheist.