is 陰 different from the other kage or am i dumb

so i thought kage was always 影 for shadow but now 陰 shows up and its ALSO kage but for shade?? or yin?? its so confusing i keep mixing them up and my phone autocorect keeps making it worse. write now im trying to learn it but i just think of yin yang and then i start thinking about 建物 and architecture for some reason lol. why does japanese have to have tow of the same word that look totally different