yobo vs tough guy

yobo and tough guy both are nouns.

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

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

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

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