I have seen the word "doublet" used to mean two words that come from the same root word.
Words built on the same root word are called derivatives. These words share the same base meaning and often have variations in prefixes or suffixes to convey different nuances or grammatical forms.
Some words that have the same root words as poverty include: Impoverished Impoverishment Impoverish
Three words that have the same root word as "trough" are "troughed," "troughs," and "troughing."
frequent, frequenting, frequently
The word reduction contains the same root as the word produce.
The word "cleaned" has the same root word as "unclean." Both words share the root word "clean."
These words are called cognate words. They are related to each other by the root word, but they are not the same exact word.
Some words that have the same root words as poverty include: Impoverished Impoverishment Impoverish
Three words that have the same root word as "trough" are "troughed," "troughs," and "troughing."
Amplified
Amplified
frequent, frequenting, frequently
electricity, electric
The word reduction contains the same root as the word produce.
Fibrous root system
The word "cleaned" has the same root word as "unclean." Both words share the root word "clean."
The Greek root "homo" means "same" or "alike." It is commonly used in words related to similarity or sameness.
Amplify, ample, and amplification all have the same root word as amplitude, which is "ample".