Inspissate
Part of speech: verb
Definition: To thicken, especially by boiling, evaporation, or condensation; condense. To become viscous.
Thicken
Part of speech: verb
Definition: To make thicker (in the sense of wider).To make thicker (in the sense of more viscous)To become thicker (in the sense of wider).To become thicker (in the sense of more viscous).