Groan (v /n) and moan (v /n) são geralmente sinônimos e podem ser traduzidos como gemido, queixa (noun), ou gemer, queixar-se (verb).

Os dois têm um sentido tanto positivo quanto negativo: a long deep sound usually expressing unhappiness, suffering or (sexual) pleasure.

O que normalmente difere entre os dois são as preposições que os acompanham.

e.g.: You usually groan with pain / pleasure. You usually moan in / with pain.

You groan at / with something: We all groaned at his terrible jokes. I groaned at the thought of a 16-hour flight.

You moan (on) about something: What are you moaning on about now? Don't go moaning on about the traffic.

Em muitos casos ambos são usados na mesma frase também, como no exemplo abaixo:

They were all moaning and groaning about how much they still had to do.

Old people's moans and groans annoy me a great deal.

Well, I hope it helped you.

Rick