Synonyms for Thaw (same or very similar meaning)
WordNet sense 1 (the process whereby heat changes something from a solid to a liquid):
melt, melting, thawingWordNet sense 2 (warm weather following a freeze; snow and ice melt):
warmingWordNet sense 3 (become or cause to become soft or liquid):
dissolve, unfreeze, dethaw, unthawFrom the ODE community, based on WordNetadd/edit