til now vs until now

til now and until now both are adverbs.

Word	Noun	Adjective	Verb	Adverb
til now	No	No	No	Yes
until now	No	No	No	Yes

As adverbs, til now and until now are synonyms defined as:

til now and until now: used in negative statement to describe a situation that has existed up to this point or up to the present time

Other synonyms of til now include as yet, heretofore, hitherto, so far, thus far, up to now, yet.

til now (adverb)	until now (adverb)
used in negative statement to describe a situation that has existed up to this point or up to the present time	used in negative statement to describe a situation that has existed up to this point or up to the present time