stepped line vs drop line

stepped line and drop line both are nouns.

Word	Noun	Adjective	Verb	Adverb
stepped line	Yes	No	No	No
drop line	Yes	No	No	No

As nouns, stepped line and drop line are synonyms defined as:

stepped line and drop line: a headline with the top line flush left and succeeding lines indented to the right

Other synonyms of stepped line include dropline, stagger head, staggered head, stephead.

stepped line (noun)	drop line (noun)
a headline with the top line flush left and succeeding lines indented to the right	a headline with the top line flush left and succeeding lines indented to the right