Outlines and tips
Describe a leaf and you start with its outline. These are the words for that, and each one arrives in English carrying a Latin ending that the ear flattens to the same tired -ate.
Three outlines
lanceolate
LAN-see-uh-layt/A blade several times longer than broad, widest below the middle and tapering to a point, like the head of a lance. Willow leaves are the example every key uses.
7 heard spellings on file
cuneate
KYOO-nee-ayt/Wedge-shaped. Used above all of a leaf base whose two sides run in straight lines down to the stalk, as in many willowherbs and rock roses.
8 heard spellings on file
acuminate
uh-KYOO-min-ut/Drawn out into a long, narrow, tapering point. It describes the tip rather than the whole blade, and the extreme version is the drip tip of a rainforest leaf, which sheds water off the end.
7 heard spellings on file
Cuneate strictly describes the base of the blade rather than the whole of it, but it is filed here because that is where people meet it, in a shape key.