Peccadillo and Venial sin

Peccadillo noun - A petty misdeed.

Venial sin and peccadillo are semantically related in small fault topic. In some cases you can use "Venial sin" instead a noun "Peccadillo".

Venial sin noun - A pardonable sin regarded as entailing only a partial loss of grace.

Peccadillo and venial sin are semantically related in slight transgression topic. You can use "Peccadillo" instead a noun phrase "Venial sin".