plateau is one of the types of elevated landform.
If you want to include all geological features, a Yardang(a sharp-crested ridge carved by wind erosion from soft but coherent deposits) might be considered a "landform".
geologists call an area where is one type of topography is a landform
no it is not a landform!
faults
Yardang is a landform. It begins with the letter y.
a key is a landform that starts with a k and a knoll is a landform that starts with K and means a hill.
there is no one that starts wit a y in twilight
Basin
delta
Erg is a landform. It is a flat sandy area of the desert with no vegetation.
Lagoon, Lake
One office supply that starts with the letter "Y" is a yellow highlighter.
ugli fruit, youngberry
funnel cloud
Bight of Benin & Bight of Biafra
U-shaped valley