leafen

As a noun leaven

is any agent used to make dough rise or to have a similar effect on baked goods.

As a verb leaven

is to add a leavening agent.

As an adjective leafen is

formed in leaves.

As adjectives the difference between leafen and leaden

is that leafen is formed in leaves while leaden is (dated) made of lead.

As a noun leafet

is (botany|archaic) a little leaf; a leaflet.

As an adjective leafen is

formed in leaves.

As adjectives the difference between leafen and leafed

is that leafen is formed in leaves while leafed is having a leaf or leaves; used mainly in combination with another word to form adjectives describing the number, form, colour, etc, of leaves.

As a verb leafed is

(leaf).

As an adjective leafen

is formed in leaves.

As a verb deafen is

to make deaf, either temporarily or permanently.

As a noun taxonomy

is the science or the technique used to make a classification.

As an adjective leafen is

formed in leaves.