濃度【のうど】
concentration, density, cardinality
濃厚【のうこう】
rich (flavor, color, etc.), strong (e.g. odor), heavy, thick (soup, makeup, etc.), dense, probable, (very) likely, strong (suspicion, sense, etc.), pronounced, passionate, sensuous, hot
濃縮【のうしゅく】
concentration (e.g. of a solution), enrichment, condensation
濃淡【のうたん】
light and shade, shade (of colour, color), depth (of flavor), complexity, strength and weakness (of flavor)
濃密【のうみつ】
thick, dense, rich (as in taste or content), deep (colour), strong (smell, scent), crowded
濃霧【のうむ】
heavy fog, dense fog, thick fog
濃紺【のうこん】
dark blue
濃い【こい】
deep (colour), dark, strong (flavour, smell, etc.), thick (consistency), dense, strong (possibility, etc.), thick (i.e. "as thick as thieves"), close, deep (love, etc.)