aerialist vs ropewalker

aerialist and ropewalker both are nouns.

Word	Noun	Adjective	Verb	Adverb
aerialist	Yes	No	No	No
ropewalker	Yes	No	No	No

As nouns, ropewalker is a hyponym of aerialist; that is, ropewalker is a word with a more specific, narrower meaning than aerialist:

aerialist: an acrobat who performs in the air (as on a rope or trapeze)
ropewalker: an acrobat who performs on a rope stretched at some height above the ground

Other hyponyms of aerialist include ropedancer.

aerialist (noun)	ropewalker (noun)
an acrobat who performs in the air (as on a rope or trapeze)	an acrobat who performs on a rope stretched at some height above the ground