tie-up vs standstill

tie-up and standstill both are nouns.

Word	Noun	Adjective	Verb	Adverb
tie-up	Yes	No	No	No
standstill	Yes	No	No	No

As nouns, tie-up and standstill are synonyms defined as:

Other synonyms of tie-up include stand.

tie-up (noun)	standstill (noun)
an interruption of normal activity	an interruption of normal activity
a social or business relationship	a situation in which no progress can be made or no advancement is possible