troubling vs disturbing

troubling and disturbing both are adjectives.

Word	Noun	Adjective	Verb	Adverb
troubling	No	Yes	No	No
disturbing	No	Yes	No	No

As adjectives, troubling and disturbing are synonyms defined as:

Other synonyms of troubling include distressful, distressing, perturbing, worrisome, worrying.

troubling (adjective)	disturbing (adjective)
causing distress or worry or anxiety	causing distress or worry or anxiety