reinforce

As a noun intensity

is the quality of being intense.

As a verb reinforce is

(senseid)to strengthen, especially by addition or augmentation.

In lang=en terms the difference between accentuate and reinforce

is that accentuate is to mark with a written accent while reinforce is to encourage a behavior or idea through repeated stimulus.

As verbs the difference between accentuate and reinforce

is that accentuate is to pronounce with an accent or vocal stress while reinforce is (senseid)to strengthen, especially by addition or augmentation.

As verbs the difference between heighten and reinforce

is that heighten is to make high; to raise higher; to elevate while reinforce is (senseid)to strengthen, especially by addition or augmentation.