wait on vs assist

wait on is not a noun while assist is a noun.

Word	Noun	Adjective	Verb	Adverb
wait on	No	No	Yes	No
assist	Yes	No	Yes	No

As verbs, wait on and assist are synonyms defined as:

Other synonyms of wait on include attend, attend to, serve.

As verbs, assist is a hypernym of wait on; that is, assist is a word with a broader meaning than wait on:

Other hypernyms of wait on include aid, help.

wait on (noun)	assist (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

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