1. SINGULARLY (ADVERB): notably

Synonyms: uniquely, remarkably        Antonyms: together, commonly

Example Sentence: 

This was a singularly done task.

2. CLAMOUR (NOUN):upheaval

Synonyms: tumult, outcry    Antonyms: calm, peace

Example Sentence:

A news channel broadcast an ongoing clamour in parliament.

3. DETERMINATION (NOUN):perseverance

Synonyms: steadfastness, dedication             Antonyms: ignorance, indecision

Example Sentence:

I saw a great determination in him.

4. PERTINENT (ADJECTIVE): relevant

Synonyms: admissible, germane              Antonyms: improper, inappropriate

Example Sentence: 

Add the pertinent topics that covers the entire syllabus.

5. FLAG (VERB):abate

Synonyms: fade, sag             Antonyms: grow, rise

Example Sentence: 

This lotion will definitely flag your pain.

6. BOTTLENECK(NOUN):obstacle

Synonyms: barrier, congestion                 Antonyms: aid, assistance

Example Sentence:

He came passing through many bottlenecks.

7. LINGER (VERB):loiter

Synonyms: drift, idle            Antonyms: advance, finish

Example Sentence: 

Don’t linger on the same topic.

8. ROBUST (ADJECTIVE): hearty

Synonyms: healthy, sturdy      Antonyms: fragile, incapable

Example Sentence:

He is an intelligent and a robust child.

9. UNDERGIRD (VERB): bolster

Synonyms: reinforce, uphold     Antonyms: undermine, weaken

Example Sentence: 

The Architect used iron rods to undergird the bridge.

10. OPT (VERB): choose

Synonyms: elect, go for   Antonyms: dislike, hate

Example Sentence: 

I opt him to be my friend.