Use the last letter

[RedDeadFred]

Nifty.

 

[Johnny Novgorod]

Yearn

 

[Barbas]

Nestle.

 

[RedDeadFred]

Eh.

 

[Barbas]

Hither.

 

[TheRiddler]

Retro.

 

[Barbas]

Others.

 

[RedDeadFred]

Sic.

 

[Barbas]

Chlorinated.

 

[Rabbitboy]

Disintegrate.

 

[Barbas]

Egrets.

 

[TheRiddler]

Secret.

 

[Barbas]

Twitchy.

 

[TheRiddler]

Yegg.

 

[Barbas]

Gluon.

 

[Johnny Novgorod]

Normal

 

[TheRiddler]

Legume.

 

[Rabbitboy]

Egg.

 

[Barbas]

Gnash.

 

[SonOfAnarchy91]

Hard