stress fracture vs fatigue fracture

stress fracture and fatigue fracture both are nouns.

Word	Noun	Adjective	Verb	Adverb
stress fracture	Yes	No	No	No
fatigue fracture	Yes	No	No	No

As nouns, stress fracture and fatigue fracture are synonyms defined as:

stress fracture and fatigue fracture: fracture resulting from excessive activity rather than a specific injury

stress fracture (noun)	fatigue fracture (noun)
fracture resulting from excessive activity rather than a specific injury	fracture resulting from excessive activity rather than a specific injury