say it: SMOOTH-nuhs
smoothness is a noun meaning "a texture without roughness; smooth to the touch". It carries 5 recorded senses.
powerful and effective language
“his eloquence attracted a large congregation”
“fluency in spoken and written English is essential”
“his oily smoothness concealed his guilt from the police”
the quality of being bland and gracious or ingratiating in manner
the quality of having a level and even surface
“the water was a glassy smoothness”
“the weather system of the Pacific is determined by the uninterrupted smoothness of the ocean”
the quality of being free from errors or interruptions
“the five-speed manual gearbox is smoothness personified”
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for smoothness come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.