1) Engorged 2) Full 3) Jam-packed 4) Like a cold sufferer 5) Like many a cold sufferer 6) Like rush-hour roadways 7) Overfull 8) Overfull as with blood Found on https://www.crosswordclues.com/clue/congested
Con·gest'ed adjective 1. (Botany) Crowded together. Gray. 2. (Medicine) Containing an unnatural accumulation of blood; hyperæmic; -- said of any part of the body. Found on http://www.encyclo.co.uk/webster/C/136