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Commonly confused words

Confused by two similar words? Every "vs" comparison on FreeDict in one place — affect and effect, who and whom, fewer and less — with clear answers and examples of when to use each.

credible vs credulous
Credible describes something believable — a credible account. Credulous describes a person who believes too re...
criteria vs criterion
Criterion is singular — one criterion. Criteria is plural — several criteria. "The main criteria is cost" is t...
cue vs queue
A cue is a signal or prompt — an actor waits for their cue — and also the stick used in snooker. A queue is a...
custodian vs janitor
In the building sense the two are largely interchangeable, with custodian the more formal job title, especiall...
custom vs habit
A custom is a practice a community shares and expects: "It is the custom here to bring flowers on the first vi...
cyborg vs android
A cyborg starts as a living organism and has artificial parts added — the biology comes first. An android is a...
cyclone vs hurricane
They are the same kind of storm with different regional names. A tropical cyclone is called a hurricane in the...
dairy vs diary
Dairy relates to milk — dairy products, a dairy farm. A diary is a book in which you record daily events or ap...
dam vs damn
A dam is a barrier that holds back water: "Beavers built a dam across the stream." Damn is a mild swear word,...
dear vs deer
Dear means beloved or precious, and it is how letters begin: "Dear Sarah, thanks for the photos." A deer is th...
decent vs descent
Decent means respectable, adequate or kind — a decent meal, a decent person. Descent means a downward movement...
deduce vs deduct
To deduce is to reach a conclusion by reasoning from evidence — Holmes deduces the answer. To deduct is to sub...
defence vs defense
There is no difference in meaning — only in spelling by region. <em>Defence</em> is standard in Britain, Irela...
definite vs definitive
Definite means clear, fixed and certain — a definite answer, a definite date. Definitive means conclusive and...
defuse vs diffuse
To defuse is to remove the danger from something — literally removing a fuse from a bomb, figuratively calming...
dementia vs senility
Dementia is a clinical term for a group of conditions causing progressive decline in memory and thinking. Seni...
Denmark vs Netherlands
Two separate northern European countries that are not neighbours — Germany sits between them. Denmark speaks D...
dependant vs dependent
In British English, a dependant with an A is a person who relies on you, and dependent with an E is the adject...
desert vs dessert
Dessert, with two S, is the sweet course at the end of a meal. Desert, with one, is arid land — or, as a verb...
despite vs dispute
Despite is a preposition meaning in spite of — <em>despite the rain, we went</em>. Dispute is a verb meaning t...
detection vs detention
Detection is discovering something hidden. Detention is holding someone in custody — or keeping a pupil behind...
deuterium vs hydrogen
Deuterium is hydrogen — specifically an isotope of it. Ordinary hydrogen has one proton and no neutron; deuter...
device vs devise
A device is a thing: a tool, gadget or scheme. To devise is to invent or plan one. The pattern is reliable in...
diary vs journal
A <em>diary</em> is a dated record of what happened, usually written up day by day: <em>She kept a diary every...