leery vs untrusting

leery and untrusting both are adjectives.

Word	Noun	Adjective	Verb	Adverb
leery	No	Yes	No	No
untrusting	No	Yes	No	No

As adjectives, leery and untrusting are synonyms defined as:

Other synonyms of leery include mistrustful, suspicious, wary.

leery (adjective)	untrusting (adjective)
openly distrustful and unwilling to confide	openly distrustful and unwilling to confide