Antonyms for Speeding up

Antonyms starting with letter R

• retard

  make happen faster, timing, act
• reduce

  increase, adjoin
• raze

  increase
• retreat

  increase, hurry
• retardation

  timing
• repress

  timing, incite, act
• remove

  adjoin
• rest

  act
• receive

  hurry
• recede

  increase
• regress

  increase