bother vs touch on

bother is a noun but touch on is not a noun.

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

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

Other hypernyms of bother include affect, bear on, bear upon, impact, touch.

bother (noun)	touch on (noun)
something or someone that causes trouble; a source of unhappiness
an angry disturbance

bother (verb)	touch on (verb)
cause annoyance in; disturb, especially by minor irritations	restore by replacing a part or putting together what is torn or broken
make confused or perplexed or puzzled	have an effect upon
make nervous or agitated	refer to or discuss briefly
intrude or enter uninvited	be relevant to
take the trouble to do something; concern oneself
to cause inconvenience or discomfort to