user7309: Many times in the suttas the monks are said to be frustrated, but the word anger is never used.. what is the difference?
My short thought is - anger is seeing wrong speech or action, and saying 'why are you acting this way - it hurts the other', whilst frustration is 'why are you acting this way - it hurts you'.
Any thoughts on this from respectable sources? 

user16635: Speaking from a kind of buddhist perspective on psychology, anger and frustration represent emotional reactions to different types of attachments. 
Anger is usually a response to a perceived external injury to an identity-object. In other words, one has an identity attachment to something — be it one's self, a loved one, a favorite book or tool or rug, etc — and one perceives that another person or thing has caused insult or injury to it. Someone sits in your favorite chair and the chair leg breaks; anger arises at that someone because they ostensibly 'caused' the loss of that attached identity.
Frustration, by contrast, is usually a response to a perceived obstacle. In other words, one has an identity attachment to a goal, desire, or achievement, and one becomes frustrated that it is not easily or immediately achieved. One wants to be a concert pianist, but discovers that the dexterity required is just out of their reach; frustration arises at the inability to achieve the attached goal.
It would make sense that monastics would be more prone to frustration than anger. They are instructed early to release attachments to any identity-objects, so they will be less prone to react to insult or injury to that which they have already determined to let go of. But releasing attachments to goals and aspirations is a more difficult project, particularly early on when monks have explicitly set the goal of monastic attainment. Frustration at one's failure to grasp the principles of the faith would be a normal occurrence in a monastic setting.

user17455: To quote Yvan Amar: "Peace is happiness at rest. Happiness is peace in motion"...
I'd say "Frustration is resistance at rest. Anger is resistance in motion". With resistance always coming from attachment.
I agree with Ted Wrigley in a previous answer, monastics (and most people actively in a spiritual path) first master the outward facing (anger). The inward facing (frustration) takes much more work and dedication. 

user43: If I remember correctly my Abhidharma lectures, both anger and frustration are the types of aversion. Anger is how aversion manifests when you feel that you are stronger than the object of your aversion, while frustration is when you feel weaker than the object/cause of aversion.

7309: <p>Many times in the suttas the monks are said to be frustrated, but the word anger is never used.. what is the difference?</p>

<p>My short thought is - anger is seeing wrong speech or action, and saying 'why are you acting this way - it hurts the other', whilst frustration is 'why are you acting this way - it hurts you'.</p>

<p>Any thoughts on this from respectable sources? </p>
 16635: <p>Speaking from a kind of buddhist perspective on psychology, anger and frustration represent emotional reactions to different types of attachments. </p>

<p>Anger is usually a response to a perceived external injury to an identity-object. In other words, one has an identity attachment to something — be it one's self, a loved one, a favorite book or tool or rug, etc — and one perceives that another person or thing has caused insult or injury to it. Someone sits in your favorite chair and the chair leg breaks; anger arises at that someone because they ostensibly 'caused' the loss of that attached identity.</p>

<p>Frustration, by contrast, is usually a response to a perceived obstacle. In other words, one has an identity attachment to a goal, desire, or achievement, and one becomes frustrated that it is not easily or immediately achieved. One wants to be a concert pianist, but discovers that the dexterity required is just out of their reach; frustration arises at the inability to achieve the attached goal.</p>

<p>It would make sense that monastics would be more prone to frustration than anger. They are instructed early to release attachments to any identity-objects, so they will be less prone to react to insult or injury to that which they have already determined to let go of. But releasing attachments to goals and aspirations is a more difficult project, particularly early on when monks have explicitly set the goal of monastic attainment. Frustration at one's failure to grasp the principles of the faith would be a normal occurrence in a monastic setting.</p>
 17455: <p>To quote Yvan Amar: "Peace is happiness at rest. Happiness is peace in motion"...</p>

<p>I'd say "Frustration is resistance at rest. Anger is resistance in motion". With resistance always coming from attachment.</p>

<p>I agree with Ted Wrigley in a previous answer, monastics (and most people actively in a spiritual path) first master the outward facing (anger). The inward facing (frustration) takes much more work and dedication. </p>
 43: <p>If I remember correctly my Abhidharma lectures, both anger and frustration are the types of aversion. Anger is how aversion manifests when you feel that you are <strong>stronger</strong> than the object of your aversion, while frustration is when you feel <strong>weaker</strong> than the object/cause of aversion.</p>
