Synonyms for «troubling signs»

The phrase "troubling signs" refers to things or indications that cause worry or concern. Full definition

Synonyms for individual words can be found below.

He notes some fresh carpet and a recently installed light switch, but the kitchen and other rooms show troubling signs of age. (theglobeandmail.com)
What other potentially troubling signs for start - up funding have you seen on the horizon? (entrepreneur.com)
If you are having trouble signing in or have forgotten your password, this is the section to go to. (interracialdatingsitesguide.com)
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