PLEASE HELP I NEED IT
Type the words with three different spellings of the sound / er /. Put your answers in alphabetical order.

abridge
acknowledge
acquaint
acquire
adjourned
aisle
annihilate
asthma
circuit
colonel
condemn
guarantee
indebtedness
indict
mortgage
pneumonia
poignant
psychology
scissors
solemn
subtle
succumb
wholly
writhe