Basis vs Foundation vs Support

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

Basis

Top 2,000 (common)B1noun

Foundation

Top 2,000 (common)B2noun

Support

Top 1,000 (very common)A2verb
Most common: Support
 BasisFoundationSupport
Pronunciation🇬🇧 /["/ˈbeɪsɪs/","/ˈbeɪsiːz/"]/🇺🇸 /["/ˈbeɪsɪs/","/ˈbeɪsiːz/"]/🇬🇧 /["/faʊnˈdeɪʃn/"]/🇺🇸 /["/faʊnˈdeɪʃn/"]/🇬🇧 /["/səˈpɔːt/","/səˈpɔːts/","/səˈpɔːtɪd/","/səˈpɔːtɪŋ/"]/🇺🇸 /["/səˈpɔːrt/","/səˈpɔːrts/","/səˈpɔːrtɪd/","/səˈpɔːrtɪŋ/"]/
MeaningThe main reason or support for something.The base or support of something.To give help or assistance.
ExampleThe basis of her argument was well-researched and convincing.The foundation of the building is made of strong concrete.I want to support my friends in their endeavors.
RegisterNeutralNeutralNeutral
How commonTop 2,000 (common)Top 2,000 (common)Top 1,000 (very common)
CEFR levelB1B2A2
Part of speechnounnounverb
Collocationsregular, annual, daily, on a… basis, whole, consistent, factual, on the basis of, basis for, firm, solid, sound, form, provide, basis for, have no basis in somethinghave no, without foundation, charitable, private, research, establish, set up, start, foundation for, deep, concrete, dig, lay, shake, stone, walloverwhelmingly, fervently, fully, agree to, pledge to, promise to, in, be well supported, be widely supported, support and encourage somebody/​something, overwhelmingly, fervently, fully, agree to, pledge to, promise to, in, be well supported, be widely supported, support and encourage somebody/​something, financially, generously, partially, help (to), through, financially, generously, partially, help (to), through, strongly, weakly, adequately, appear to, seem to, tend to, be supported by data, be supported by evidence, be well supported
Antonymssuperficiality, surfacetop, peak, tipoppose, hinder, neglect
Common mistakesConfused with 'base' as a physical structure., Using 'basis' in plural form incorrectly., Confusing 'basis' with similar sounding words like 'basis' and 'basses'.Confusing 'foundation' with 'founding' — they are different., Using 'foundation' without specifying what it's a base for., Mispronouncing it as 'foundashun' instead of 'founday-shun'.Confused with 'supplement', which means to add to something., Using 'support' as a noun without clarification (e.g. 'She gave support' is vague)., Mixing up 'support' and 'oppose'.
Usage notesUsed in discussions to refer to the fundamental reason or support behind ideas or actions. Common in academic and formal contexts, but can be used informally too. Avoid in casual conversation when discussing simple preferences.Use 'foundation' in contexts like construction, education, or principles. It is neutral but fits best in formal or academic discussions. Avoid in casual conversation about non-structural topics.This word can be used in many contexts like emotional support, financial help, or supporting a cause. It's appropriate in both casual and formal contexts.

Frequently asked questions: Basis vs Foundation vs Support

What's the difference between Basis, Foundation, and Support?

Basis: The main reason or support for something. Foundation: The base or support of something. Support: To give help or assistance.

Which is more common: Basis, Foundation, and Support?

Support is the most common in everyday English.

Which is more advanced: Basis, Foundation, and Support?

Foundation is the highest level, at B2, on the CEFR scale.

Are Basis, Foundation, and Support the same CEFR level?

Basis: B1, Foundation: B2, Support: A2 on the CEFR scale.

What part of speech are Basis, Foundation, and Support?

Basis: noun, Foundation: noun, Support: verb.

Can you show an example of each?

Basis: The basis of her argument was well-researched and convincing. Foundation: The foundation of the building is made of strong concrete. Support: I want to support my friends in their endeavors.

Can I use Basis, Foundation, and Support interchangeably?

Not always. Basis, Foundation, and Support 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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