cobble vs touch on

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

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

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

cobble: repair or mend
touch on: restore by replacing a part or putting together what is torn or broken

Other hypernyms of cobble include bushel, doctor, fix, furbish up, mend, repair, restore.

cobble (noun)	touch on (noun)
rectangular paving stone with curved top; once used to make roads

cobble (verb)	touch on (verb)
repair or mend	restore by replacing a part or putting together what is torn or broken
pave with cobblestones	have an effect upon
	refer to or discuss briefly
	be relevant to