A stratagem is a scheme or a clever plot.

Cosmetic refers to how something or someone looks. 

Otiose is a serving no useful purpose; having no excuse for being.

Wangle means to get something through deception.

If you're chilly, you might close a window that's letting in a draught.

Gusto is vigorous and enthusiastic enjoyment.

Use the noun foresight to describe successful planning for the future. 

Remorse is a feeling of deep regret.

Forfeit means to lose or give up something, usually as a penalty.

Lapsed means no longer active or practicing.

Unequivocal is admitting of no doubt or misunderstanding.

When something proliferates, it's growing, spreading or multiplying really quickly.

To impair is to make worse or less effective.

Daunt means to cause to lose courage.

A cluster is a small group of people or things. 

Liberation means the setting free of someone or something. 

Bluff can mean a high cliff, or it can describe a person who is pretending to something they're not.

A superfluity is an excess or abundance.

Incredulous means you can't or won't believe something.

Rhetorical is an emphasizing style at the expense of thought.