grounds vs front yard

grounds and front yard both are nouns.

Word	Noun	Adjective	Verb	Adverb
grounds	Yes	No	No	No
front yard	Yes	No	No	No

As nouns, front yard is a hyponym of grounds; that is, front yard is a word with a more specific, narrower meaning than grounds:

Other hyponyms of grounds include backyard, dooryard, garden, playground, side yard.

grounds (noun)	front yard (noun)
the enclosed land around a house or other building	the yard in front of a house; between the house and the street
your basis for belief or disbelief; knowledge on which to base belief
a justification for something existing or happening
a tract of land cleared for some special purposes (recreation or burial etc.)
dregs consisting of solid particles (especially of coffee) that form a residue