graft / graphed 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. 👇
graft: (noun) (surgery) tissue or organ transplanted from a donor to a recipient; in some cases the patient can be both donor and recipient. (noun) the act of grafting something onto something else. (verb) cause to grow together parts from different plants.
graphed: (verb) represent by means of a graph. (verb) plot upon a graph.
graft: g·r·AE·f·t
graphed: NA
(Examples are Wikipedia snippets under the CC ShareAlike 3.0 license. Definitions drawn from WordNet.)