Is there any criteria to call a load inductive for switching applications?
IEC standard 947 defines various utilization categories for relay contacts. Some relay manufacturers summarize those categories in their literature. Some examples:

AC-1
Non Inductive or slightly inductive loads, example: resistive furnaces, Heaters

AC-3 Squirrel-cage motors: starting, swithces off motors during running time

AC-7a Slightly inductive loads in household appliances: examples: mixers, blenders

DC-13 Control of D.C. electromagnetics



Relays conforming to USA NEMA standards have specified motor horsepower power ratings at typical motor voltages for which a given relay or contactor is suitable. Relays conforming to other standards often have motor power ratings in kW.

There is a lot of information available. You will probably need to find some of the information available from manufacturers and suppliers and study it and determine what is best for your needs.