souring

As verbs the difference between souring and sourcing

is that souring is while sourcing is .

As nouns the difference between souring and sourcing

is that souring is (dated) any sour apple while sourcing is (chiefly|us) the supply of resources needed by a business process.

As nouns the difference between scouring and souring

is that scouring is the act of cleaning a surface by rubbing it with a brush, soap and water while souring is (dated) any sour apple.

As verbs the difference between scouring and souring

is that scouring is while souring is .

As verbs the difference between touring and souring

is that touring is while souring is .

As an adjective touring

is working for a short time in different places; "itinerant laborers"; "a road show"; "traveling salesman"; "touring company".

As a noun souring is

(dated) any sour apple.