忍耐 vs 忍受 usage/difference
I answered a similar question here http://www.cantonese.sheik.co.uk/phorum/read.php?3,114539,114551#msg-114551

忍耐- (n) patience; forbearance

忍耐- (v) exercise patience; restrain oneself

忍受- (v) to endure; to bear


Let's try put the terms into sentences

我未預備好，你要忍耐一吓。- I am not ready yet,  you have to be patient.
我未預備好，你要忍受一吓。- I am not ready yet, you have to endure it. (Doesn't seem as suitable as be patient in this sentence.)

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我無法'忍受'這種痛苦！- I can't 'endure' this kind of pain.; I can't 'bear' this kind of pain. (it seem like 忍受 translate to 'endure' or 'bear' is correct.)
我無法'忍耐'這種痛苦！ - I can't 'be patient with' this kind of pain (This sentence doesn't make much sense)

More examples:

忍耐是有限度的。 (Patience has a limit)
忍受痛苦是有限度的 (Enduring pain has a limit)