Use the last letter

[Barbas]

Yellow.

 

[RedDeadFred]

Walrus.

 

[Barbas]

Scarcity.

 

[TheRiddler]

Yttrium.

 

[Barbas]

Malevolence.

 

[Fijiman]

euphonium

 

[TheRiddler]

Mulch.

 

[Barbas]

Hamish.

 

[The Squid King]

Hannah

 

[Barbas]

Hoplite.

 

[Johnny Novgorod]

Economic

 

[Rabbitboy]

Crash

 

[Barbas]

Hackers.

 

[Rabbitboy]

Slackers

 

[Barbas]

Scuba.

 

[RedDeadFred]

Antique.

 

[Scarim Coral]

Eradicate

 

[Clearwaters]

Excellence

 

[Barbas]

Elgar.

 

[TheRiddler]

Raglan.