tightrope walker vs funambulist

tightrope walker and funambulist both are nouns.

Word	Noun	Adjective	Verb	Adverb
tightrope walker	Yes	No	No	No
funambulist	Yes	No	No	No

As nouns, tightrope walker and funambulist are synonyms defined as:

tightrope walker and funambulist: an acrobat who performs on a tightrope or slack rope

tightrope walker (noun)	funambulist (noun)
an acrobat who performs on a tightrope or slack rope	an acrobat who performs on a tightrope or slack rope