Aaram as in Aaram karna means taking rest
sajjan is the vilom shabd.
Vilom shabd for 'sheetal' is 'ushn'.
Uthla is the Vilom of Gehra
It is correct to say that Sajjan is the vilom shabd of the vishram.
Vilom shabda for nindra is tandra. That means to stay awake.
Dhoop धूप is the vilom shabd Chaya is also chaanv छाँव
The vilom shabd of sankalp is vikalp. Vilob shabd means opposite meaning or antonym.
taandaw
Biram
asamay
The vilom shabd or antonym of "anand" in Hindi is "dukh" which means sorrow or sadness.