凝縮 （ギョウシュク） condensation (of ideas, emotions, etc.), condensation (of a vapour or gas)

凝固 （ギョウコ） coagulation, freezing, solidification

凝る （こる） to become stiff (of muscles), to get absorbed in, to develop a passion for, to devote oneself to, to become obsessed with, to get hooked on, to be elaborate, to be intricate, to be exquisite, to be particular about, to pay great attention to

凝らす （こらす） to concentrate, to devote, to apply, to strain, to rack

凝らす （こごらす） to freeze, to congeal, to concentrate one's attention on, to devote oneself to something, to ponder, to meditate

凝らせる （こごらせる） to freeze, to congeal

凝る （こごる） to congeal, to freeze