Word Families for ESL: Build, Builder, Built, Building, Rebuilt
CEFR B1-B2 • Vocabulary • Master one stem and unlock 5+ words: noun, verb, adjective, adverb, agent
Why word families multiply your vocabulary
Most English words come in families: one root takes different endings to become a noun, verb, adjective, adverb, or person-doing-the-action. Learning the family means learning 5 words for the price of one. "Build" gives you "builder" (person), "built" (past), "building" (noun and continuous form), "rebuilt" (re-prefix), and "buildable" (adjective). This page covers the 30 high-frequency word families that show up most in academic and business English.
The five common forms
| Form | Common ending | Example |
|---|---|---|
| Verb | — (root) | analyze |
| Noun (action) | -tion, -sion, -ment | analysis |
| Noun (person) | -er, -or, -ist | analyst |
| Adjective | -al, -ic, -tive, -able | analytical |
| Adverb | -ly | analytically |
30 high-frequency word families
| Verb | Noun (action) | Noun (person) | Adjective | Adverb |
|---|---|---|---|---|
| analyze | analysis | analyst | analytical | analytically |
| build | building / build | builder | buildable | — |
| create | creation | creator | creative | creatively |
| decide | decision | decider | decisive | decisively |
| design | design | designer | designed | — |
| develop | development | developer | developmental | developmentally |
| educate | education | educator | educational | educationally |
| employ | employment | employer / employee | employed | — |
| examine | examination | examiner | examinable | — |
| explain | explanation | — | explanatory | explanatorily |
| explore | exploration | explorer | exploratory | exploratorily |
| finance | financing | financier | financial | financially |
| function | function | — | functional | functionally |
| imply | implication | — | implicit | implicitly |
| improve | improvement | improver | improvable | — |
| interpret | interpretation | interpreter | interpretive | interpretively |
| manage | management | manager | manageable | manageably |
| measure | measurement | — | measurable | measurably |
| operate | operation | operator | operational | operationally |
| organize | organization | organizer | organizational | organizationally |
| predict | prediction | predictor | predictive | predictively |
| produce | production | producer | productive | productively |
| prove | proof | prover | provable | provably |
| reduce | reduction | — | reducible | reducibly |
| refer | reference | referee | referential | referentially |
| research | research | researcher | researchable | — |
| resolve | resolution | resolver | resolvable | resolvably |
| respond | response | responder | responsive | responsively |
| simulate | simulation | simulator | simulated | — |
| vary | variation | — | various / variable | variously |
Hear the rhythm
"Sandeep is a developer, but Marina is also working on development. They will develop the new feature using developmentally-sound practices."
"The analyst ran analyses on three datasets, analyzed the patterns, and gave an analytical presentation that was analytically rigorous."
"Aiyana is the manager who manages the team. Management is happy with her work, and the workload is manageable."
Pronunciation patterns
Stress shifts: when you add a suffix, the stressed syllable often moves. PHO-to-graph (noun) → pho-TO-graph-er (person) → pho-to-GRAPH-ic (adjective). Listen carefully to native speakers — the stress patterns are predictable but invisible to readers.
PHO-to-graph (noun) → pho-TO-graph-er → pho-to-GRAPH-ic
e-CON-o-my (noun) → e-co-NOM-ic (adjective) → e-co-NOM-ic-al-ly (adverb)
Common word-family mistakes
- "It is a financial decision" when you mean "It is a financial choice" or "It is financially driven." Both work — pick the form that matches the syntax.
- "She analyzes the analysis" = redundant. Use "She did the analysis" or "She analyzed the data." Avoid same-family redundancy.
- "The decision was decisive" = redundant. Use "The decision was clear" or "She was decisive in making the call."
- "He is a developer of software" → "He is a software developer" or "He develops software." More natural compound.
- "The improvement is improvable" → "The improvement could go further" or "There is more room to improve." Avoid clunky -able + same root.
A research-paper paragraph using one family
"To analyze the relationship between A and B, we analyzed three datasets. The analysis was analytically rigorous, with each analyst independently coding the same sample. Analytical agreement was 87% before reconciliation, suggesting the framework is robust."
Practice: Test yourself
Tap each question to reveal the answer.