Common_Errors_in_English_usage

Originally these two words were synonymous, but "enormity" got whittled
down to meaning something monstrous or outrageous. Don't wonder at the
"enormity" of the Palace of Versailles unless you wish to express horror
at this embodiment of Louis XIV's ego. "Enormity" can also be used as a
noun meaning "monstrosity."
END RESULT/END
Usually a redundancy. Most of the time plain "result" will do fine.
ENQUIRE/INQUIRE
These are alternative spellings of the same word. "Enquire" is perhaps
slightly more common in the UK, but either is acceptable in the US
IN ROUTE/EN ROUTE
"En route" is a French phrase meaning "on the way," as in "En route to
the gallows, Lucky was struck by lightning." Don't anglicize this
expression as "in route."
ENSUITE
Americans who have wandered chilly London hallways in the middle of the
night in search of a toilet will appreciate learning the peculiar
British meaning of the word "ensuite."
In French, a set of two rooms or more forming a single accommodation can
be advertised as rooms "en suite" (forming a suite). But the single word
French word "ensuite" means something entirely different: "then, later."
Around the middle of the 20th century English landlords and hoteliers
began to anglicize the phrase, placing it before the noun, so that
traditional "rooms en suite" became "en suite rooms," Ads read "bath
ensuite" or "toilet ensuite" as if the phrase meant "in the suite." The
phrase "en suite" came to be used solely to designate bathrooms attached
to a bedroom.
Following standard English patterns, they hyphenated the phrase as
"en­suite bath" and often made the phrase into a single word: "ensuite
bath." These have become standard British usage; but hoteliers often go
a step further by writing "all rooms ensuite" (Americans would write
"all rooms with bath").
It is clearly nonstandard to use "ensuite" as if it were a noun
synonymous with "toilet" or "bathroom": "I went to the ensuite to take a
shower." You may puke on your suit, but not into "the ensuite."
ENTHUSE
"Enthuse" is a handy word and "state enthusiastically" is not nearly so
striking; but unfortunately "enthuse" is not acceptable in the most
formal contexts.
ENTOMOLOGY/ETYMOLOGY