plot of land vs plot of ground

plot of land and plot of ground both are nouns.

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

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

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

Other synonyms of plot of land include patch, plot.

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