aha |ɑːˈhɑː| — An exclamation of understanding, realization, invention, or recognition.

ahead |əˈhed| — at or in the front

aheap |əˈhiːp| — In a heap; huddled together.

ahem |əˈhem| — the utterance of a sound similar to clearing the throat; intended to get attention, express hesitancy, fill a pause, hide embarrassment, warn a friend, etc.

ahistorical |ˌeɪhɪˈstɔːrɪkl| — unconcerned with or unrelated to history or to historical development or to tradition

ahorse |əˈhɔːrs| — on the back of a horse

ahorseback |əˈhɔːsbæk| — on the back of a horse

ahoy |əˈhɔɪ| — (nautical) Used to hail a ship, a boat or a person, or to attract attention.

ahull |əˈhʌl| — (nautical) at the hull of a ship