assist vs avail

assist and avail both are nouns.

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

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

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

assist (verb)	avail (verb)
act as an assistant in a subordinate or supportive function	take advantage of
work for, or be a servant to	take or use
give help or assistance; be of service	be of use to, be useful to