ほう
かんば
None
If you point flowers in the same direction you'll be able to smell their wonderful perfume. The best way to get perfume out of flowers is to make them face the same way. Then the smell will go the same direction, making you smell great.
You decide to perfume your entire home (ほう) by planting flowers all the way around it, all facing in toward it.
Currently there are no similar looking kanji which exist in the WaniKani learning system