cock-a-hoop vs boastful

cock-a-hoop and boastful both are adjectives.

Word	Noun	Adjective	Verb	Adverb
cock-a-hoop	No	Yes	No	No
boastful	No	Yes	No	No

As adjectives, cock-a-hoop and boastful are synonyms defined as:

Other synonyms of cock-a-hoop include big, braggart, bragging, braggy, crowing, self-aggrandising, self-aggrandizing.

cock-a-hoop (adjective)	boastful (adjective)
exhibiting self-importance	exhibiting self-importance