"impediments" in the noun sense
1. hindrance, hinderance, deterrent, impediment, balk, baulk, check, handicap
something immaterial that interferes with or delays action or progress
2. obstruction, obstructor, obstructer, impediment, impedimenta
any structure that makes progress difficult
Source: WordNet® (An amazing lexical database of English)
Princeton University "About WordNet®."
WordNet®. Princeton University. 2010.
View WordNet® License