also aha, exclamation of surprise or delighted discovery, late 14c., from ah + ha.
This seely widewe and hire doughtres two ... cryden out "harrow!" and "weloway! A ha! þe fox!" and after him they ran [Chaucer]
agronomy
aground
ague
ah
aha
a-ha
ahead
ahem
ahimsa
ahistoric
ahistorical
