Ian:
Scaramouch
Scara·mouch (skar′ə mo̵̅o̅s̸h′, -mo̵̅o̅c̸h′)
noun
1. a stock character in old Italian comedy, depicted as a braggart and poltroon
2. a boastful coward or rascal
His sentance: Shaggy and Scoobie Doo are both a scaramouch.
Sarah:
acoustic
acous·tic (ə ko̵̅o̅s′tik)
adjective
1. having to do with hearing or with sound as it is heard
2. of acoustics
3. a. designating a musical instrument, usually a string instrument, whose tones are not electronically amplified
b. employing such an instrument or instruments
Sarah's sentance: I can hear acoustics when I sing.