base construction base contact base containing base contains base control base cost base could base course base cover base currency base current base curve base damage base data base de base defense base design base development base device base diameter base did base directory base do base does not base due base element base elements base end base engine base erosion base exchange base excision base fabric base fare base fee base figure base film base first base flange base fluid base for exploring base for visiting base form base forms base formula base formulation base frame base frequency base fuel base function base functions base funding base game base glass base grille base group base has base have base having base height base here base hit base hits base hospital base hotel base housing base hydrolysis base image base in afghanistan base in antarctica base in europe base in germany base in iraq base in new base in north base in order base in qatar base in san base in south base in southern base in syria base in water base include base included base includes base income base information base ingredients base is added base is an alkali base is formed base is located base is made base is only base is potassium base is pyridine base is sodium base is sodium hydroxide base is used