A (a)   businessman seldom fails in his business. (wise or clever)

Spell the word that means mutual trust and friendship among people who spend a lot of time together.

(a)  

Your first statement made sense, but the (a)   seems purely made up. (to refer to the last thing listed or stated)

Isn’t it amusing how a man as (a)   as Santa Claus can fit through a tiny chimney? (fat; robust)

With this growth, the idea of (a)   robots around the world will soon become a reality; they'll definitely be everywhere. (all over; everywhere)

My friend is just plain (a)   ; she can never decide what to do.

The judge said it was the most (a)   act she had ever seen; she couldn't believe someone would actually do that. (extremely bad; terrible)

I'm sorry if I sounded (a)   because I'm actually being serious: The Quadruple Bypass burger will kill you. (sarcasm; being funny in serious situations)