scion

As nouns the difference between stalk and scion

is that stalk is the stem or main axis of a plant, which supports the seed-carrying parts or stalk can be a particular episode of trying to follow or contact someone while scion is a descendant, especially a first-generation descendant.

As a verb stalk

is (lb) to approach slowly and quietly in order not to be discovered when getting closer or stalk can be to walk haughtily.

As nouns the difference between zion and scion

is that zion is zayin, Hebrew letter ז while scion is a descendant, especially a first-generation descendant.

As a proper noun Zion

is a mountain in Israel on which Jerusalem is built.

As nouns the difference between scion and understock

is that scion is a descendant, especially a first-generation descendant while understock is (horticulture) the rootstock onto which the scion is.

As a verb understock is

to stock with an insufficient amount.