We have put together a list of words that are similar to OVERHEAR.

2 Alternative Words Similar to overhear

1 Catch Verb      Synonym Words Like Catch
2 Hear Verb      Synonym Words Like Hear

8 definitions of overhear

1 To hear more of (anything) than was intended to be heard; to hear by accident or artifice.
2 To hear again.
3 hear, usually without the knowledge of the speakers
4 To hear (speech or someone speaking) without the speaker's awareness or intent.
5 To hear something without the speaker's awareness or intent.
6 To hear (one who does not wish to be heard or does not know that he is heard, or what is not addressed to the hearer or is not intended to be heard by him); hear by accident or stratagem.
7 To hear over again; hear from beginning to end.
8 To hear something that wasn't meant for one's ears.
We get our data from many different dictionaries across the web:
Wordnik, Wiktionary, Century, American Heritage, Gcide