Noun to Adjective
Confidence
Confident
To agree with someone
To see eye to eye
To Relax
To put your feet up
Something that is very easy
As easy as ABC
To be very quiet
To be as quiet as a mouse
Logic
Logical
To be at each other's throats
When something costs a lot of money
To cost an arm and a leg
To be completely available
As free as a bird
To be very busy
Respect
Respectful
To ask someone a lot of questions about a specific topic
To pick someone's brain
To be very clumsy
To be all fingers and thumbs
To run very fast
To run like the wind
To be rude or distant
To be as cold as ice
Clarity
Clear
To refrain from saying something, even if you want to
To bite one's tongue
To hesitate to make a big decision (like proposing marriage)
To drag one's feet
To be a very calm person
To be as cool as a cucumber
To be very pale due to illness or fear
To be white as a sheet
Solution
Solvable/ Unsolvable
When someone does not understand a joke
To go over someone's head
When someone wants to help, but they cannot because of specific limitations
To have one's hands tied
To be very fresh (maybe after a good night of sleep)
To be as fresh as a daisy
To be very confusing (not clear)
To be as clear as mud