electricity, electric
"elect" is the root word for elet and election
Three words that have the same root word as "trough" are "troughed," "troughs," and "troughing."
The word "cleaned" has the same root word as "unclean." Both words share the root word "clean."
I have seen the word "doublet" used to mean two words that come from the same root word.
umm, what words? here's a couple for you: induction, conduction, deduction, ..
Amplify, ample, and amplification all have the same root word as amplitude, which is "ample".
These words are called cognate words. They are related to each other by the root word, but they are not the same exact word.
The words "associate," "associative," and "disassociate" share the same root word as "association." They all derive from the Latin word "associare," meaning "to unite or join together."
One word that shares the same root as "unreasonable" is "reason." Both words stem from the Latin word "ratio," meaning "reason" or "logic."
The root word "leg" or "lect" means to choose, gather, or read. It is often seen in words related to selecting or collecting information, such as "collect," "election," and "intellect."
The word "experience" shares the same root as "experiment." Both words are derived from the Latin word "experiri," meaning "to try."
The word "territory" shares the same root word as "terrain." Both words come from the Latin word "terra," which means earth or land.