Example : His impression of her was favorable.
What are your feelings about the crisis?.
It strengthened my belief in his sincerity.
I had a feeling that she was lying.

Synonyms : belief, feeling, impression, opinion

Example : The theatrical notion of disguise is associated with disaster in his stories.
He had a whimsy about flying to the moon.
Whimsy can be humorous to someone with time to enjoy it.

Synonyms : whim, whimsey, whimsy

Example : Buttons and needles are notions.