Antonyms for Speeding up

Antonyms starting with letter S

• slow

  make happen faster, hurry, act
• stop

  make happen faster, assist the progress of, hurry
• shrink

  increase
• stay

  hurry
• slowing

  timing
• slowing down

  timing
• slow down

  timing
• subtract

  adjoin
• stall

  act
• suppress

  incite
• soften

  increase
• 

  soothe

  increase
• slump

  increase