cobble vs cobblestone

cobble and cobblestone both are nouns.

Word	Noun	Adjective	Verb	Adverb
cobble	Yes	No	Yes	No
cobblestone	Yes	No	Yes	No

As nouns, cobble and cobblestone are synonyms defined as:

cobble and cobblestone: rectangular paving stone with curved top; once used to make roads

Other synonyms of cobble include sett.

As verbs, cobble and cobblestone are synonyms defined as:

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

cobble (verb)	cobblestone (verb)
repair or mend	pave with cobblestones
pave with cobblestones