As nouns the difference between topliner and toplines
is that topliner is one who is billed as the primary entertainer while toplines is plural of lang=en.
As a verb toplines is
third-person singular of topline.
topliner
English
Noun
(
en noun)
One who is billed as the primary entertainer. toplines
English
Noun
(head)
Verb
(head)
(topline)