The difference between Perk up and Stimulate

When used as verbs, perk up means to become more upright, whereas stimulate means to encourage into action.

check bellow for the other definitions of Perk up and Stimulate

Perk up as a verb (intransitive):

To become more upright

Examples:

"His ears perked up when he heard there would be ice cream."
Perk up as a verb (intransitive):

to become more lively or enthusiastic.
Perk up as a verb (transitive):

To cause to be more upright, straighten up
Perk up as a verb (transitive):

to cause to be more lively or enthusiastic.
Perk up as a verb (intransitive, obsolete):

To exalt oneself, take on a higher status or position.