Commonly Confused Words Started With Alphabet A
 

 

 
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Commonly Confused Words - Terms Started With Alphabet A
 

A


a, an--Use a before any word or acronym beginning with a consonant
sound. Use an before any word beginning with a vowel sound, regardless
of whether the word begins with a vowel.



    a light-water reactor; an LWR; a HEPA
    filter (because HEPA is pronounced as a word rather than as letters); a hypothesis;
    an hour.



accuracy, precision--Accuracy is the agreement between the true
value and the result obtained by measurement. Accurate means
"errorless." Precision is the agreement among repeated measurements of
the same quantity. Precise means "clearly delineated, definite."



    A sentence can be accurate but not precise. Our
    measurements show that the tank contains about 8 gallons (accurate). The
    tank contains 8.3 gallons (accurate and precise).


affect, effect--To affect is to influence or change. To effect
is to bring about. An effect is a result or an influence.



    Ingesting alcohol affects her driving competence.
    Margaritas effect an undesirable change in his personality; he shouts
    and tells you that they have no effect on his speech.







NOTE: "Impact" is frequently and
inappropriately used as a verb; "affect" is a better choice. Rather than saying
"These cuts impact our project," say "These cuts affect our
project."


all ready, already--All ready means "completely ready" or
"everyone is ready." Already means "previously."


all right, alright--There is no such word as alright. Forget about
it, all right?


alternate, alternative--To alternate is to occur in successive
turns; first one, then the other. An alternate is a substitute or second
choice.



    The alternate plan is a good substitute.



    An alternative is a choice among mutually exclusive objects or courses
    of action.



    An alternative plan may be one choice of many.

among, between--Among is used with more than two items. Between
is used with two items, except in some close collective relationships.



    We quarreled among the five of us, but the real
    argument was between Bob and Harold. An alliance was effected between
    Germany, Italy, and Japan.



and/or--Use this form only with three selections: one, or the other, or
both. In most writing the distinction is not useful.


assure, ensure, insure--Assure means "to convince," "to
guarantee." Insure means "to guard against loss." Ensure means
"to make certain." Assure and ensure are often used
interchangeably, but they actually have different meanings. Assure takes
a direct object--usually a person or group of persons. You assure someone
that something has been done. Ensure does not imply that you are giving
assurance to someone else. You ensure that something has been done.



    I assure you of my good intentions.

    Please insure this package.


    Ensure that you lock your car.



 
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Dictionary of Chemical Terminology

This is a "living glossary". This means that the glossary may grow every week as individuals submit new entries. This has been set up as a class resource for CEM-181H, the freshmen honors chemistry lecture at Michigan State University.

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Dictionary of Commonly Confused Words

The Wrong Word Dictionary : Most Commonly Confused Words · The Words Almost Everyone Confuses and Misuses .

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Dictionary of Geology

A science that deals with the history of the earth as recorded in rocks.

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