Synonyms for Soothing (same or very similar meaning)
WordNet sense 1 (providing or experiencing physical well-being or relief (`comfy' is informal)):
comfortable, comfyWordNet sense 2 (freeing from fear and anxiety):
assuasive, calming, pacifyingWordNet sense 3 (restoring confidence and relieving anxiety):
reassuringFrom the ODE community, based on WordNetadd/edit