1. 凝固：Solder bridge 桥焊 | Solidifying 凝固 | Solidus 固相线

2. 硬化：solidification 硬化 | solidifying 硬化 | solidity 凝固

3. 固化：solidification point 固化点 | solidifying 固化 | solidifying point 固化点

4. 固化 固体化作用 凝固：solidify 固化 | solidifying 固化 固体化作用 凝固 | solidifyingfront 凝固面

noun

1. the process of becoming hard or solid by cooling or drying or crystallization

e.g. the hardening of concrete
he tested the set of the glue

Synonym: hardeningsolidificationsetcuring