Fringe benefit and Plus

Fringe benefit noun - An incidental benefit awarded for certain types of employment (especially if it is regarded as a right).

Plus and fringe benefit are semantically related in bonus topic. In some cases you can use "Plus" instead a noun phrase "Fringe benefit", when it comes to topics like perk, added extra. informal substitute

Plus noun - Something added (as by growth).

Fringe benefit and plus are semantically related in advantage topic. You can use "Fringe benefit" instead a noun "Plus".