intensify (v.)

• accelerate
• accent
• accentuate
• accrue
• accumulate
• advance
• aggrandize
• aggravate
• amplify
• annoy
• appreciate
• augment
• balloon
• bloat
• boom
• breed
• broaden
• complicate
• concentrate
• condense
• consolidate
• crescendo
• deepen
• deteriorate
• develop
• double
• embitter
• emphasize
• enhance
• enlarge
• escalate
• exacerbate
• exaggerate
• exalt
• exasperate
• focus
• gain
• grow
• heighten
• increase
• irritate
• magnify
• mount
• multiply
• proliferate
• provoke
• quicken
• ramify
• redouble
• reinforce
• rise
• rouse
• sharpen
• snowball
• sour
• spread
• strengthen
• stress
• swell
• triple
• wax
• whet
• widen
• worsen