chummy vs matey

chummy and matey both are adjectives.

Word	Noun	Adjective	Verb	Adverb
chummy	No	Yes	No	No
matey	No	Yes	No	No

As adjectives, chummy and matey are synonyms defined as:

chummy and matey: (used colloquially) having the relationship of friends or pals

Other synonyms of chummy include pally, palsy-walsy.

chummy (adjective)	matey (adjective)
(used informally) associated on close terms	(used colloquially) having the relationship of friends or pals
(used colloquially) having the relationship of friends or pals