springing cow vs springer

springing cow and springer both are nouns.

Word	Noun	Adjective	Verb	Adverb
springing cow	Yes	No	No	No
springer	Yes	No	No	No

As nouns, springing cow and springer are synonyms defined as:

springing cow (noun)	springer (noun)
a cow about to give birth	a cow about to give birth
	a large spaniel with wavy silky coat usually black or liver and white
	the lowest stone in an arch -- from which it springs