【Speed】 , 【accelerate】 , 【quicken】 , 【hasten】 , 【hurry】 , 【precipitate】 can mean to go or make go fast or faster.
【Speed】 emphasizes rapidity of motion or progress; as a transitive verb it suggests an increase in tempo; as an intransitive verb, a high degree of swiftness.
【Accelerate】 stresses increase in rate of motion or progress; it does not necessarily imply 【speed】 .
【Quicken】 stresses shortening of the time consumed, often with a suggestion of animation or stimulation.
【Hasten】 implies urgent quickness or a quick or premature outcome.
【Hurry】 implies haste that causes confusion or prevents concentrated attention.
【Precipitate】 implies impetuousness, suddenness, or abruptness.