heighten, rise -- (become more extreme; "The tension heightened")
heighten -- (make more extreme; raise in quantity, degree, or intensity; "heightened interest")
enhance, heighten, raise -- (increase; "This will enhance your enjoyment"; "heighten the tension")
heighten -- (increase the height of; "The athletes kept jumping over the steadily heightened bars")
sharpen, heighten -- (make (one's senses) more acute; "This drug will sharpen your vision")
intensify, compound, heighten, deepen -- (make 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")
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