skyline vs sensible horizon

skyline and sensible horizon both are nouns.

Word	Noun	Adjective	Verb	Adverb
skyline	Yes	No	No	No
sensible horizon	Yes	No	No	No

As nouns, skyline and sensible horizon are synonyms defined as:

skyline and sensible horizon: the line at which the sky and Earth appear to meet

Other synonyms of skyline include apparent horizon, horizon, visible horizon.

skyline (noun)	sensible horizon (noun)
the line at which the sky and Earth appear to meet	the line at which the sky and Earth appear to meet
the outline of objects seen against the sky