The difference between Gingiva and Gum

Gingiva as a noun (anatomy):

The gum, consisting of the tissue surrounding the roots of the teeth and covering the jawbone.

Gum as a noun (often, in the plural):

The flesh around the teeth.

Gum as a verb:

To chew, especially of a toothless person or animal.

Gum as a verb (transitive):

To deepen and enlarge the spaces between the teeth of (a worn saw), as with a gummer.

Gum as a noun (mostly, uncountable):

Any of various viscous or sticky substances that are exuded by certain plants.

Gum as a noun (mostly, uncountable):

Any viscous or sticky substance resembling those that are exuded by certain plants.

Gum as a noun (mostly, uncountable):

Chewing gum.

Gum as a noun (countable):

A single piece of chewing gum.

Gum as a noun (South Africa, often, in the plural):

A gummi candy.

Gum as a noun (US, dialect, Southern US):

A hive made of a section of a hollow gum tree; hence, any roughly made hive.

Gum as a noun (US, dialect, Southern US):

A vessel or bin made from a hollow log.

Gum as a noun (US, dialect):

A rubber overshoe.

Gum as a noun:

A gum tree.

Gum as a verb (sometimes with {{m, up):

}} To apply an adhesive or gum to; to make sticky by applying a sticky substance to.

Gum as a verb:

To stiffen with glue or gum.

Gum as a verb (colloquial, with {{m, up):

}} To impair the functioning of a thing or process.