It’s spring and soon the azaleas and rhododendrons will be blooming. I see azaleas referred to as rhododendrons and vice versa often. So I found a website that explains the similarities and differences. I have both deciduous and evergreen azaleas, but have been so unsuccessful with Rhododendrons. Both are beautiful. Check out this site for some information:
https://www.gardenia.net/guide/Azaleas-and-Rhododendrons-What-Difference
Monroe County Master Gardener Association 
What a detailed guide- and the pictures are great. Thanks Linda.