1. NOISOME (ADJECTIVE): stinking

Synonyms: smelly, disgusting          Antonyms: good, pleasant

Example Sentence: 

The atmosphere of the room seemed to become noisome.

2. NOMADIC (ADJECTIVE): itinerant

Synonyms: roving, migrant                    Antonyms: native, settled

Example Sentence:

On the whole, however, nomadic life is at the present day, the exception.

3. NONCHALANT (ADJECTIVE): careless

Synonyms: casual, unconcerned              Antonyms: careful, concerned 

Example Sentence:

He does not care for anything as he is nonchalant.

4. NUISANCE (NOUN): problem

Synonyms: trouble, bore      Antonyms: benefit, pleasure

Example Sentence: 

It’s a real nuisance having to pick up the kids from school every day.

5. NINCOMPOOP (NOUN): idiot

Synonyms: fool, blockhead                Antonyms: perspicacious, sagacious

Example Sentence: 

Only a complete nincompoop would believe a story like that.

6. MYRIAD (ADJECTIVE): innumerable

Synonyms: countless, endless                     Antonyms: bounded, calculable

Example Sentence:

There are myriad jobs in IT sector this year.

7. MUTABLE (ADJECTIVE): changeable 

Synonyms: variable, flexible                    Antonyms: certain, definite

Example Sentence: 

Time space and matter are mutable realities.

8. MUSE (VERB): consider

Synonyms: reflect, think                     Antonyms: ignore, neglect

Example Sentence:

He lay and mused in the warm sunlight.

9. MORTIFY (VERB): cause to feel shame

Synonyms: annoy, deflate              Antonyms: please, soothe

Example Sentence: 

He mortified her mother by creating a conspiracy against his brother.

10. MORONIC (ADJECTIVE): stupid

Synonyms: foolish, idiotic             Antonyms: intelligent, sensible

Example Sentence: 

 

He is moronic by nature.