Use the last letter

[Barbas]

Nebelwerfer.

 

[UltraDeth]

Rasp

 

[Barbas]

Plums!

 

[UltraDeth]

Scallop

 

[Barbas]

Pears!

 

[UltraDeth]

Singlet

 

[Barbas]

Tarts!

 

[UltraDeth]

Scour

 

[Barbas]

Ramparts.

 

[UltraDeth]

Stringent

 

[Troublesome Lagomorph]

Tremulous.

 

[Barbas]

Signets.

 

[Troublesome Lagomorph]

Sign.

 

[Barbas]

Nomenclature.

 

[Troublesome Lagomorph]

Eradicate.

 

[UltraDeth]

Enthral

 

[Barbas]

Lagging.

 

[UltraDeth]

Gyro

 

[Barbas]

Oubliette.

 

[UltraDeth]

Elvis