Fusion
Melting = fusing
That would be "fused".
g
The word you're looking for is - weld.
meet
co-operates
organ
Amass-meaning to gather together.
united
Ice melting is a spring word. It begins with the letter i.
Cluster is a 7 letter word that means gather together. Other words include collect, combine and compile.
Group
choir
Seam.
freezing,solidifying