Thickener
Part of speech: noun
Definition: Any substance added to something in order to thicken it; a thickening agent.
Thickening
Part of speech: verb
Definition: To make thicker (in the sense of wider).
Part of speech: noun
Definition: the process of making something, or becoming, thick or viscousa substance, usually a source of starch, used to thicken a saucea thickened part of a structure