Neither. Willingness is a noun.
No, "teachable" is an adjective that describes a person's ability or willingness to learn something. The verb form would be "teach."
excited is both an adjective and a verb. so, yes.
Both.
Both
both
both
I'm so worried. Is worried an adjective or a verb?
pointed can be both a verb and adjective. Verb: 'He pointed his finger at her.'Adjective: The pointed rock looked funny.
It can be both a verb - to adventure or a noun - an adventure.
It's both.
it is both
"frustrate" can function as both a verb and an adjective. As a verb, it means to cause feelings of discouragement or annoyance. As an adjective, it describes a person who is feeling those emotions.