Similar but Different Adjectives

It was an awesome movie.  having a great quality, inspiring
It was an awful movie.  having a terrible quality

It was childish behavior  (behaviour).  having immature behavior, negative
It was childlike behavior.  qualities like a child, positive

We have two dependent children. needing someone for care
We have two dependable children.  having a nature of completing promises
 

We are confident about winning.  sure [L.confidere]
The message is confidential.  private  [L. confidenti]

The laughing child was playing.  having a good nature
The laughable car was powered with tequila.  impossible to be serious about
 

It is a crisp day, today.  cool and dry
It is a crispy cracker.   thin and crunchy (makes a pleasant sound )

She has light hair.  a natural quality
She has lightened hair. an unnatural/changed quality
 

We had a fun time at the movies.  amusing
We saw a funny movie. causing laughter
 

He is a loving son.  having a quality of giving love
He is a lovable son.  having a nature of attracting love
 

The general made a tactical advance.  military move [L. tacticus]
He is a tactful politician.  having skills handling situations  [L. tactus]

tact (n.) – skill in dealing with difficult or delicate situations

He is selective a boo ut what he eats. having a quality of being choosy, picky
They are selling selected items. particular, carefully chosen
Select people can live there. a small number, exclusive, wealthy

Your food is tasty.  having a good taste
You are a tasteful dresser.  having good judgment for fashion

He is a sensible person.  reasonable [sensibilis]
He is a sensitive person.   easily irritated or hurt [L. sensitivus]

He is a worthy competitor. 
He is a worthless competitor.