cerate / serrate are similar-sounding terms with different meanings (referred to as homophones). To better understand the differences, see below for definitions, pronunciation guides, and example sentences using each term. 👇
cerate: (noun) a hard medicated paste made of lard or oil mixed with wax or resin.
serrate: (verb) make saw-toothed or jag the edge of. (adjective) notched like a saw with teeth pointing toward the apex.
cerate: NA
serrate: s·EH·r·EY·t
(Examples are Wikipedia snippets under the CC ShareAlike 3.0 license. Definitions drawn from WordNet.)