Fly in the ointment and Sticking point

Fly in the ointment noun - An inconvenience that detracts from the usefulness of something.

Sticking point and fly in the ointment are semantically related. In some cases you can use "Sticking point" instead a noun phrase "Fly in the ointment".

Sticking point noun - A point at which an impasse arises in progress toward an agreement or a goal.

Fly in the ointment and sticking point are semantically related. Sometimes you can use "Fly in the ointment" instead a noun phrase "Sticking point".