Her grouchiness was evident in her constant complaining.

She grouchily complained about the long wait.

She becomes grouchier when she's tired.

She is the grouchiest person I know.

She is always complaining and never seems to be in a good mood. She is such a groucher.

The grouchers complained about everything at the party.

He wore Groucho glasses to the party.

The grouchinesses of the children were evident after a long day at school.

I woke up with a bad case of the grouchies.

She grouchingly complained about the weather.