Question

-poiesis
-porosis
-stenosis
-rrhage
-poietin

substance that produces
narrowing
lessening in density
production
discharging heavily

Explanation:

Match -poiesis

The suffix -poiesis refers to formation or production.
Matching definition: "Production"

Match -porosis

The suffix -porosis refers to a condition of passage, porousness, or decrease in density (as in osteoporosis).
Matching definition: "Lessening in density"

Match -stenosis

The suffix -stenosis refers to abnormal narrowing or stricture of a passage or vessel.
Matching definition: "Narrowing"

Match -rrhage

The suffix -rrhage refers to bursting forth, rapid flow, or heavy discharge.
Matching definition: "Discharging heavily"

Match -poietin

The suffix -poietin refers to a substance that promotes or produces formation.
Matching definition: "Substance that produces"

Answer:

Suffix	Definition
-porosis	Lessening in density
-stenosis	Narrowing
-rrhage	Discharging heavily
-poietin	Substance that produces