assist vs hasten

assist is a noun but hasten is not a noun.

Word	Noun	Adjective	Verb	Adverb
assist	Yes	No	Yes	No
hasten	No	No	Yes	No

As verbs, hasten is a hyponym of assist; that is, hasten is a word with a more specific, narrower meaning than assist:

assist (noun)	hasten (noun)
(sports) the act of enabling another player to make a good play
the activity of contributing to the fulfillment of a need or furtherance of an effort or purpose

assist (verb)	hasten (verb)
act as an assistant in a subordinate or supportive function	act at high speed
work for, or be a servant to	cause to occur rapidly
give help or assistance; be of service	move hurridly
	speed up the progress of; facilitate