“Shakedown” is a noun, including senses involving extortion, a thorough search, or a testing/settling period. “Shake down” is the corresponding phrasal verb for extorting, searching, or becoming established. The one-word/two-word choice tracks grammatical function.
ReviewedEvidence2 sourcesSectionEnglish Usage
Quick answer
Use “shakedown” as the noun and “shake down” as the phrasal verb.
Key details
Confusion Familyword-boundary
Rule Familyphrasal verb versus noun
Termsshakedown, shake down
Variant ScopeCambridge separately records the closed noun “shakedown” and the two-word phrasal verb “shake down.”
Further guidance
Core difference
The closed form “shakedown” is a noun; the spaced form “shake down” is a phrasal verb.
Fast Test
If the expression names an event, search, extortion attempt, or test, use “shakedown.” If it carries verb tense or describes the action/process, use “shake down.”
Usage Boundary
Meanings vary by context, but the noun/verb boundary remains the key spelling distinction.
Sources and evidence
Sources are shown with the role they play in this guide. Historical or style-sensitive claims are kept within the evidence boundary described above.
“Burnout” is the noun for a state of severe exhaustion or, in other senses, a result/failure; “burn out” is the phrasal verb for becoming exhausted, ceasing to burn, or failing from heat. The spacing follows grammatical function rather than a single spelling preference.
Standard English writes “a lot” as two words for a large amount, number, frequency, or degree. “Alot” is a common misspelling in this sense; it should not be confused with the separate verb “allot.”
“Any more” can be a determiner for additional quantity and an adverb meaning “no longer.” Cambridge notes that the one-word adverb “anymore” is especially common in American English, while the determiner remains two words.
“Anyone” is one word when it means any person. “Any one” is written as two words when the construction refers to a single member of a larger set, including the common pattern “any one of …”.
“Blackout” is the closed noun, while “black out” is the two-word phrasal verb. The verb can describe losing consciousness or obscuring/darkening something; the noun names the resulting event or state.
“Blowout” is a closed noun for several events or results, and Cambridge also records “blow-out” as a noun variant. “Blow out” is the two-word phrasal verb, including the sense of extinguishing a flame.
