The difference between Bird cherry and Hackberry

Bird cherry as a noun:

A cherry tree, Prunus padus, native to the northern Eurasia.

Bird cherry as a noun:

Any of several of the species of cherry trees sometimes grouped in the subgenus or section Prunus sect. Laurocerasus of Prunus subg. Cerasus (), of eastern Asia () (), of Japan (), of eastern Asia ()

Bird cherry as a noun:

A berry (fruit) produced by these trees.

Bird cherry as a noun (rare):

sweet cherry, Prunus avium

Hackberry as a noun:

Any of several deciduous trees of the genus Celtis, widespread over the Northern Hemisphere, having small fruit.

Hackberry as a noun:

The fruit of these plants.

Hackberry as a noun (uncountable):

The wood of these plants.

Hackberry as a noun:

Prunus padus, a species of cherry tree, of Eurasia, or its berry.