1. CONSTRAINT (NOUN): (बाधा) limitation or restriction.

Synonyms: control, restraint

Antonyms: frankness

Example Sentence:

"They would be able to talk without constraint".

2. CONTEMPT (NOUN) (निंदा) disregard for something

Synonyms: disrespect, disdain

Antonyms: respect

Example Sentence:

"When he was found to have lied to the House this was a contempt".

3. HOSTILITY (NOUN): (विरोधभाव) unfriendliness

Synonyms: bitterness, malevolence

Antonyms: friendliness

Example Sentence:

"Peace talks were stalled after recent hostilities."

4. DISTINGUISH (VERB): (अंतर करना) treat different.

Synonyms: differentiate, discriminate

Antonyms: combine

Example Sentence:

"We must distinguish between two kinds of holiday".

5. SIGNIFICANT (ADJ): (महत्वपूर्ण) noteworthy

Synonyms: remarkable, outstanding

Antonyms: insignificant

Example Sentence:

"In times of stress her dreams seemed to her especially significant".

6. PREVALENT (ADJ): (प्रचलित) widespread

Synonyms: extensive, rampant

Antonyms: rare

Example Sentence:

"The social ills prevalent in society today".

7. RECEDE (VERB): (पीछे जाना) (Verb): go back

Synonyms: retreat, withdraw

Antonyms: grow

Example Sentence:

"The floodwaters had receded".

8. BYGONE (ADJ): (पुराना) past 

Synonyms: extinct, former

Antonyms: present

Example Sentence:

"The museum consists of a fascinating collection of rural bygones".

9. COLLABORATION (NOUN): (सहभागिता) partnership

Synonyms: alliance, association

Antonyms: resistance

Example Sentence:

"He wrote a book in collaboration with his son".

10. RELEGATE (VERB): (कम करना) downgrade

Synonyms: lower, put down

Antonyms: promote

Example Sentence:

"They aim to prevent women from being relegated to a secondary role".