Touchdown is a type of Landing. Landing is a different concept from Start. Start is a synonym of Departure. Departure is a type of Band. 
Reduce is a synonym of Trim. Trim is a type of Cut. 
Touchdown --IsA--> Landing <--DistinctFrom--> Start <--Synonym--> Departure --IsA--> Band 
Reduce <--Synonym--> Trim --IsA--> Cut 