tally vs gain ground

tally is a noun but gain ground is not a noun.

Word	Noun	Adjective	Verb	Adverb
tally	Yes	No	Yes	No
gain ground	No	No	Yes	No

As verbs, gain ground is a hypernym of tally; that is, gain ground is a word with a broader meaning than tally:

Other hypernyms of tally include advance, gain, get ahead, make headway, pull ahead, win.

tally (noun)	gain ground (noun)
the act of counting; reciting numbers in ascending order
a score in baseball made by a runner touching all four bases safely
a bill for an amount due

tally (verb)	gain ground (verb)
determine the sum of	obtain advantages, such as points, etc.
keep score, as in games
gain points in a game
be compatible, similar or consistent; coincide in their characteristics