A state of being overcrowded or filled to excess.

An accumulation of something, typically a blockage.

संचय

English Usage: The congestion in the nasal passages made it difficult to breathe.

Hindi Usage: नाक की नलिकाओं में संचय ने सांस लेना मुश्किल कर दिया।

A matter or situation regarded as unwelcome or harmful and needing to be dealt with and overcome.

A difficulty that requires a solution.

कठिनाई

English Usage: She solved the math problem in no time.

Hindi Usage: उसने जल्दी ही गणित की कठिनाई का समाधान कर दिया।