avail vs aid

avail and aid both are nouns.

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

As verbs, aid is a hypernym of avail; that is, aid is a word with a broader meaning than avail:

Other hypernyms of avail include assist, help.

avail (noun)	aid (noun)
a means of serving	the activity of contributing to the fulfillment of a need or furtherance of an effort or purpose
	the work of providing treatment for or attending to someone or something
	a person or thing that is a resource that helps make something easier or possible to do
	gift of money or other material help to support a person or cause

avail (verb)	aid (verb)
take advantage of	improve the condition of
take or use	give help or assistance; be of service
be of use to, be useful to