plot of ground vs plot of land

plot of ground and plot of land both are nouns.

Word	Noun	Adjective	Verb	Adverb
plot of ground	Yes	No	No	No
plot of land	Yes	No	No	No

As nouns, plot of ground and plot of land are synonyms defined as:

plot of ground and plot of land: a small area of ground covered by specific vegetation

Other synonyms of plot of ground include patch, plot.

plot of ground (noun)	plot of land (noun)
a small area of ground covered by specific vegetation	a small area of ground covered by specific vegetation