user2493: I came across this excellent discussion of nirodha recently:
What is Nirodha?
wherein nirodha was defined to be "the cessation of suffering" i.e. "the third noble truth".
I tend to use the word "nibbana" to represent this phenomenon, so I am a little bit confused about the need for 2 different terms here.
If one were to set aside the concept of physical rebirth after death, would any difference between the concepts of "nirodha" and "nibbana" remain?
If so, what is the nature of this difference?

user-1: 
Patisambhidamagga, Nibbana-dhatu:
"There are two types of relinquishment through cessation: relinquishment as giving up, and relinquishment as entering into. It gives up defilements and aggregates, thus it is relinquishment as giving up; cognizance enters cessation which is the nibbana principle thus it is relinquishment as entering into. These are the two kinds of relinquishment through cessation."
Nirodhavasena dve vossaggaa: pariccaagavossaggo ca, pakkhandanavossaggo ca. Kilesa ca khandhe ca pariccajatiiti, pariccaagavossaggo; nirodhanibbaanadhaatuyaa cittam pakkhandatiiti. Pakkhandanavossaggo nirodhavasena ime dve vossaggaa.


This, bhikkhu, is a designation for the element of Nibbāna: the removal of lust, the removal of hatred, the removal of delusion. The destruction of the taints is spoken of in that way.
https://suttacentral.net/sn45.7/en/bodhi


we enter upon and abide in the cessation of perception and feeling. And our taints are destroyed by our seeing with wisdom.
https://suttacentral.net/mn31/en/bodhi


"When a monk has emerged from the cessation of perception & feeling, to what does his mind lean, to what does it tend, to what does it incline?"
"When a monk has emerged from the cessation of perception & feeling, his mind leans to seclusion, tends to seclusion, inclines to seclusion."
https://www.accesstoinsight.org/tipitaka/sn/sn41/sn41.006.than.html#fn-4

According to the commentary, "seclusion" here stands for Nibbana.

user17553: I have not learnt the meaning of Niroddha from the Suttas but I think Niroddha is a kind of tool or process which when employed by someone prevents the effect of a cause from coming into existence... for example if you wear a fire proof glove then you can put your hands into the fire and you will not be affected.
Another interesting example would be of a chameleon. It changes color whenever it perceives a threat or seeks food. This way inspite of being present among the enemies it survives.
By employing Niroddha Nirvana is achieved.

user8157: Nirodha is a process, namely, the cessation of defilements & suffering (caused by insight).
Nibbana is the pre-existing element of peace that is experienced when cessation occurs.
Its like opening a window to experience a cool breeze. Nirodha is opening the window. Nibbana is the cool breeze.

2493: <p>I came across this excellent discussion of nirodha recently:<br />
<a href="https://buddhism.stackexchange.com/q/3116/2493">What is Nirodha?</a></p>
<p>wherein nirodha was defined to be &quot;the cessation of suffering&quot; i.e. &quot;the third noble truth&quot;.</p>
<p>I tend to use the word &quot;nibbana&quot; to represent this phenomenon, so I am a little bit confused about the need for 2 different terms here.</p>
<p>If one were to set aside the concept of physical rebirth after death, would any difference between the concepts of &quot;nirodha&quot; and &quot;nibbana&quot; remain?</p>
<p>If so, what is the nature of this difference?</p>
 -1: <blockquote>
<p>Patisambhidamagga, Nibbana-dhatu:</p>
<p>&quot;There are two types of relinquishment through cessation: relinquishment as giving up, and relinquishment as entering into. It gives up defilements and aggregates, thus it is relinquishment as giving up; <strong>cognizance enters cessation which is the nibbana principle</strong> thus it is relinquishment as entering into. These are the two kinds of relinquishment through cessation.&quot;</p>
<p>Nirodhavasena dve vossaggaa: pariccaagavossaggo ca, pakkhandanavossaggo ca. Kilesa ca khandhe ca pariccajatiiti, pariccaagavossaggo; <strong>nirodhanibbaanadhaatuyaa cittam</strong> pakkhandatiiti. Pakkhandanavossaggo nirodhavasena ime dve vossaggaa.</p>
</blockquote>
<blockquote>
<p>This, bhikkhu, is a designation for the element of Nibbāna: the removal of lust, the removal of hatred, the removal of delusion. The destruction of the taints is spoken of in that way.
<a href="https://suttacentral.net/sn45.7/en/bodhi" rel="nofollow noreferrer">https://suttacentral.net/sn45.7/en/bodhi</a></p>
</blockquote>
<blockquote>
<p>we enter upon and abide in the cessation of perception and feeling. And our taints are destroyed by our seeing with wisdom.
<a href="https://suttacentral.net/mn31/en/bodhi" rel="nofollow noreferrer">https://suttacentral.net/mn31/en/bodhi</a></p>
</blockquote>
<blockquote>
<p>&quot;When a monk has emerged from the cessation of perception &amp; feeling, to what does his mind lean, to what does it tend, to what does it incline?&quot;</p>
<p>&quot;When a monk has emerged from the cessation of perception &amp; feeling, his mind leans to seclusion, tends to seclusion, inclines to seclusion.&quot;
<a href="https://www.accesstoinsight.org/tipitaka/sn/sn41/sn41.006.than.html#fn-4" rel="nofollow noreferrer">https://www.accesstoinsight.org/tipitaka/sn/sn41/sn41.006.than.html#fn-4</a></p>
</blockquote>
<p><em>According to the commentary, &quot;seclusion&quot; here stands for Nibbana.</em></p>
 17553: <p>I have not learnt the meaning of Niroddha from the Suttas but I think Niroddha is a kind of tool or process which when employed by someone prevents the effect of a cause from coming into existence... for example if you wear a fire proof glove then you can put your hands into the fire and you will not be affected.
Another interesting example would be of a chameleon. It changes color whenever it perceives a threat or seeks food. This way inspite of being present among the enemies it survives.
By employing Niroddha Nirvana is achieved.</p>
 8157: <p>Nirodha is a process, namely, the cessation of defilements &amp; suffering (caused by insight).</p>
<p>Nibbana is the pre-existing element of peace that is experienced when cessation occurs.</p>
<p>Its like opening a window to experience a cool breeze. Nirodha is opening the window. Nibbana is the cool breeze.</p>
