aha
aha 1. आहा "Aha! so you're back to work."

ahead
ahead 1. आगे "Go ahead."

ahem
ahem 1. अहाँ!{आश्चर्य~या~अविश्वास~सूचक~अव्यय~जो~लेखन~में~प्रयोग~किया~जाता है} "Ahem! may I make a suggestion."