pugnacious vs hard-boiled

pugnacious and hard-boiled both are adjectives.

Word	Noun	Adjective	Verb	Adverb
pugnacious	No	Yes	No	No
hard-boiled	No	Yes	No	No

As adjectives, pugnacious and hard-boiled are synonyms defined as:

Other synonyms of pugnacious include hard-bitten.

pugnacious (adjective)	hard-boiled (adjective)
ready and able to resort to force or violence	(eggs) cooked until the yolk is solid
tough and callous by virtue of experience	used of persons; emotionally hardened
	tough and callous by virtue of experience