weeping beech vs beech tree

weeping beech and beech tree both are nouns.

Word	Noun	Adjective	Verb	Adverb
weeping beech	Yes	No	No	No
beech tree	Yes	No	No	No

As nouns, beech tree is a hypernym of weeping beech; that is, beech tree is a word with a broader meaning than weeping beech:

weeping beech: variety of European beech with pendulous limbs
beech tree: any of several large deciduous trees with rounded spreading crowns and smooth grey bark and small sweet edible triangular nuts enclosed in burs; north temperate regions

Other hypernyms of weeping beech include beech.

weeping beech (noun)	beech tree (noun)
variety of European beech with pendulous limbs	any of several large deciduous trees with rounded spreading crowns and smooth grey bark and small sweet edible triangular nuts enclosed in burs; north temperate regions