aid vs assist

aid and assist both are nouns.

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

As nouns, aid and assist are synonyms defined as:

aid and assist: the activity of contributing to the fulfillment of a need or furtherance of an effort or purpose

Other synonyms of aid include assistance, help.

As verbs, aid and assist are synonyms defined as:

Other synonyms of aid include help.

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

aid (noun)	assist (noun)
the activity of contributing to the fulfillment of a need or furtherance of an effort or purpose	(sports) the act of enabling another player to make a good play
the work of providing treatment for or attending to someone or something	the activity of contributing to the fulfillment of a need or furtherance of an effort or purpose
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

aid (verb)	assist (verb)
improve the condition of	act as an assistant in a subordinate or supportive function
give help or assistance; be of service	work for, or be a servant to
	give help or assistance; be of service