Combination vs Fusion vs Integration vs Synthesis

When to use each in English, with meaning, register, and examples.

Combination

Top 2,000 (common)B2noun

Fusion

Top 5,000 (fairly common)

Integration

Top 2,000 (common)C1noun

Synthesis

FormalTop 3,000 (common)C1noun
Most formal: Synthesis
 CombinationFusionIntegrationSynthesis
Pronunciation🇬🇧 /["/ˌkɒmbɪˈneɪʃn/"]/🇺🇸 /["/ˌkɑːmbɪˈneɪʃn/"]/🇬🇧 //ˈfjuːʒən//🇺🇸 //ˈfjuːʒən//🇬🇧 /["/ˌɪntɪˈɡreɪʃn/"]/🇺🇸 /["/ˌɪntɪˈɡreɪʃn/"]/🇬🇧 /["/ˈsɪnθəsɪs/","/ˈsɪnθəsiːz/"]/🇺🇸 /["/ˈsɪnθəsɪs/","/ˈsɪnθəsiːz/"]/
MeaningA mix of different things together.The process of combining two or more things into one.The process of combining things to work together.The process of combining different ideas or things to create something new.
ExampleThe combination of colors in her painting is truly remarkable.The fusion of cultures can lead to unique art forms.The integration of new software into the company's existing system was seamless.the synthesis of art with everyday life
RegisterNeutralNeutralNeutralFormal
How commonTop 2,000 (common)Top 5,000 (fairly common)Top 2,000 (common)Top 3,000 (common)
CEFR levelB2-C1C1
Part of speechnounnounnoun
Collocationsideal, perfect, right, in combination (with), combination of, ideal, perfect, right, in combination (with), combination ofnuclear fusion, cultural fusion, cuisine fusion, fusion energy, fusion musictrue, complete, full, degree, level, achieve, bring about, accelerate, integration between, integration into, integration with, a move towards/​toward integration, a need for integration, a process of integration, true, complete, full, degree, level, achieve, bring about, accelerate, integration between, integration into, integration with, a move towards/​toward integration, a need for integration, a process of integrationsynthesis of ideas, synthesis process, synthesis reaction, synthesis theory, synthesis techniques
Antonymsseparation, division-segregation, divisionanalysis, disintegration
Common mistakesConfused with 'combine' as a verb., 'Combination' used as a verb instead of a noun., Misplacing the stress on the wrong syllable: 'COM-bin-a-tion' instead of 'com-BI-na-tion'.Confused with 'fission', which means splitting instead of combining., Used incorrectly as a verb, 'to fusion'., Omitting context, leading to vagueness in meaning.Confusing 'integration' with 'segregation'., Using 'integrate' incorrectly as a noun instead of a verb., Not clarifying what is being integrated.Confused with 'analysis' meaning breakdown instead of combination., Used inappropriately in casual conversations., Omitting 'of' when describing what is synthesized.
Usage notesUsed in both formal and informal contexts. Commonly seen in discussions about recipes, math, and combinations of different concepts. Avoid in casual conversations when a simpler word like 'mix' would suffice.Used in scientific contexts, such as physics and biology, but can also refer to cultural or culinary combinations. Avoid in overly casual conversations.Commonly used in business, technology, and psychology contexts. Avoid using in casual conversations, as it may seem overly technical.Use 'synthesis' in academic or professional contexts. It's not appropriate for casual conversations. Common in science, research, and literature.

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Combination
Fusion

Frequently asked questions: Combination vs Fusion vs Integration vs Synthesis

What's the difference between Combination, Fusion, Integration, and Synthesis?

Combination: A mix of different things together. Fusion: The process of combining two or more things into one. Integration: The process of combining things to work together. Synthesis: The process of combining different ideas or things to create something new.

Which is more formal: Combination, Fusion, Integration, and Synthesis?

Synthesis is the most formal of these.

Can you show an example of each?

Combination: The combination of colors in her painting is truly remarkable. Fusion: The fusion of cultures can lead to unique art forms. Integration: The integration of new software into the company's existing system was seamless. Synthesis: the synthesis of art with everyday life

Can I use Combination, Fusion, Integration, and Synthesis interchangeably?

Not always. Combination, Fusion, Integration, and Synthesis are related and overlap in some contexts, but they differ in register, how common they are, and usage, so swapping one for another can change the meaning or tone. Check the differences above before substituting.

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