Verbal Classification

All except Deuce are terms associated with cricket.

All except Mathematics are branches of Mathematics.

All others are parts of a calendar.

In all other pairs, first is the alloy used to make the second. (Iron is not an alloy but a metal.)

All except Orion are zodiac signs, while Orion is a constellation.

All except Diplomacy are forms of administration.

All except Einstein are scientists related to radioactivity.

All except Sailor need raw material to work on.

All except Enmity are synonyms.

All except Methane are products obtained from petroleum.