yobbo vs tough guy

yobbo and tough guy both are nouns.

Word	Noun	Adjective	Verb	Adverb
yobbo	Yes	No	No	No
tough guy	Yes	No	No	No

As nouns, tough guy is a hyponym of yobbo; that is, tough guy is a word with a more specific, narrower meaning than yobbo:

Other hyponyms of yobbo include bullyboy, muscle, muscleman, skin, skinhead, plug-ugly.

yobbo (noun)	tough guy (noun)
a cruel and brutal fellow	someone who bullies weaker people