attend vs attend to

attend and attend to both are verbs.

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

As verbs, attend and attend to are synonyms defined as:

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

attend (verb)	attend to (verb)
give heed (to)	get down to; pay attention to; take seriously
work for, or be a servant to	work for, or be a servant to
take charge of or deal with
be present at (meetings, church services, university), etc.
to accompany as a circumstance or follow as a result