The difference between Fizz and Soda

When used as nouns, fizz means an emission of a rapid stream of bubbles, whereas soda means sodium bicarbonate (usually baking soda).

Fizz is also verb with the meaning: to emit bubbles.

check bellow for the other definitions of Fizz and Soda

Fizz as a noun:

An emission of a rapid stream of bubbles.

Examples:

"I poured a cola and waited for the fizz to settle down before topping off the glass."
Fizz as a noun:

The sound of such an emission.

Examples:

"Evan sat back in the hot tub and listened to the relaxing fizz and pops produced by the eruption of bubbles. "
Fizz as a noun:

A carbonated beverage, especially champagne.

Examples:

"Nathan ordered an orange fizz from the soda jerk at the counter."

Fizz as a verb (intransitive):

To emit bubbles.
Fizz as a verb (intransitive):

To make a rapid hissing or bubbling sound.

Examples:

"the fizzing fuse of a bomb"
Fizz as a verb (intransitive):

To shoot or project something moving at great velocity.
Fizz as a verb:

To travel at a great velocity, producing a sound caused by the speed.

Soda as a noun (uncountable):

Sodium bicarbonate (usually baking soda).
Soda as a noun (uncountable):

Sodium carbonate (usually washing soda).
Soda as a noun (uncountable):

Sodium in chemical combination.
Soda as a noun (uncountable):

Carbonated water (water impregnated with pressurised carbon dioxide, originally made with sodium bicarbonate).
Soda as a noun (chiefly, US, regional, especially, in the northeast, uncountable):

Any carbonated (usually sweet) soft drink.
Soda as a noun (chiefly, US, regional, especially, in the northeast, countable):

A glass, bottle or can of this drink.
Soda as a noun (card games):

The first card in the dealing box in the game of faro, which is discarded to leave 51 cards in play.