Ahem and Hellos

Ahem noun - 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..

Hellos and ahem are semantically related In some cases you can replace term "Hellos" with "Ahem", this nouns are similar.

Ahem and hellos are semantically related in emphatic exclamation topic. Sometimes you can use "Ahem" instead a noun "Hellos".