Topline vs Topliner - What's the difference?

As nouns the difference between topline and topliner

is that topline is the upper curvature of a horse's withers, back, and loin while topliner is one who is billed as the primary entertainer.

is to be billed as the primary entertainer.

(en noun)

The upper curvature of a horse's withers, back, and loin.

* 2002 , Ted S. Stashak, Ora Robert Adams, Adams' Lameness in Horses (page 75)

When viewing the horse in profile, attention must be paid to the curvature and proportions of the topline .

Principal billing.

* 1969 , Ebony magazine (volume 24, number 9, July 1969, page 146)

In recent weeks Cosby has, perhaps more than any other topline entertainer of the moment, been both at the pinnacle and at the crossroads.

(toplin)

To be billed as the primary entertainer.

* Variety [http://www.variety.com/article/VR1118050123?refCatId=16]

[Whitney] Houston's success in music led her to topline the features "Waiting to Exhale," "The Preacher's Wife" and the telefilm "Cinderella."

* topliner

(en noun)

One who is billed as the primary entertainer.