aid vs attend to

aid is a noun but attend to is not a noun.

Word	Noun	Adjective	Verb	Adverb
aid	Yes	No	Yes	No
attend to	No	No	Yes	No

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

aid (noun)	attend to (noun)
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

aid (verb)	attend to (verb)
improve the condition of	get down to; pay attention to; take seriously
give help or assistance; be of service	work for, or be a servant to