Open English Wordnet
Verbs
(v)heighten, risebecome more extreme“The tension heightened” (v)heightenmake more extreme; raise in quantity, degree, or intensity“heightened interest” (v)enhance, heighten, raiseincrease the level of“This will enhance your enjoyment”,
“heighten the tension” (v)heightenincrease the height of“The athletes kept jumping over the steadily heightened bars” (v)sharpen, heightenmake (one's senses) more acute“This drug will sharpen your vision” (v)intensify, compound, heighten, deepenmake more intense, stronger, or more marked“The efforts were intensified”,
“Her rudeness intensified his dislike for her”,
“Pot smokers claim it heightens their awareness”,
“This event only deepened my convictions”