til now vs thus far

til now and thus far both are adverbs.

Word	Noun	Adjective	Verb	Adverb
til now	No	No	No	Yes
thus far	No	No	No	Yes

As adverbs, til now and thus far are synonyms defined as:

til now and thus far: 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, until now, up to now, yet.

til now (adverb)	thus far (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