chummy vs palsy-walsy

chummy and palsy-walsy both are adjectives.

Word	Noun	Adjective	Verb	Adverb
chummy	No	Yes	No	No
palsy-walsy	No	Yes	No	No

As adjectives, chummy and palsy-walsy are synonyms defined as:

chummy and palsy-walsy: (used colloquially) having the relationship of friends or pals

Other synonyms of chummy include matey, pally.

chummy (adjective)	palsy-walsy (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