relate vs touch on

relate and touch on both are verbs.

Word	Noun	Adjective	Verb	Adverb
relate	No	No	Yes	No
touch on	No	No	Yes	No

As verbs, relate and touch on are synonyms defined as:

Other synonyms of relate include bear on, come to, concern, have to do with, pertain, refer, touch.

relate (verb)	touch on (verb)
make a logical or causal connection	restore by replacing a part or putting together what is torn or broken
give an account of; narrate	have an effect upon
have or establish a relationship to	refer to or discuss briefly
be relevant to	be relevant to
be in a relationship with