a likelihood of confusion

create confusion

pseudoisochromatic card

confusion matrix

avoid confusion with

be most commonly confused with

be not to be confused with（主語を）

be difficult to confuse with

easily-confused with

mix up ~ with

through a confusion of

be confused with disease of

confuse ~ with lack of commitment

confuse someone with the enemy

get someone mixed up with

（2） The holder of trademark right may request the person who has the right to use the trademark pursuant to the preceding paragraph to affix an indication that may sufficiently prevent any confusion between the goods or services pertaining to the business of the said person and those of its own or its members.〔【出典】日本法令外国語訳データベースシステム 〕

（2） The holder of trademark right or of exclusive right to use may request the person who has the right to use the trademark pursuant to the preceding paragraph to affix an indication that may sufficiently prevent any confusion between the goods or services pertaining to the business of the said person and those of its own.〔【出典】日本法令外国語訳データベースシステム 〕

A and B are two different things.

be careful not to confuse A with B

confound A with B

confusion of Ls and Rs

get one's Ls and Rs mixed up

be confused radiographically with

it was this deficiency, perhaps, of collateral issue, and the consequent undeviating transmission, from sire to son, of the patrimony with the name, which had, at length, so identified the two as to merge the original title of the estate in the quaint and equivocal appellation of the "House of Usher"- an appellation which seemed to include, in the minds of the peasantry who used it, both the family and the family mansion.〔【出典】日英対訳文・対応付けデータ（独立行政法人情報通信研究機構）〕"_FALL1", "2594651"

"Fancy his having the insolence to confound me with the official detective force!〔【出典】英文："The Adventure of the Speckled Band" by Arthur Conan Doyle、訳者：大久保ゆう〕"_CO-SPEC", "2164472"

"Don't confuse your thoughts, feelings and perceptions with reality.""VOA-T301", "2164034"

Some teachers confuse bullying for some rite of passage, and they look the other way.

However, the actress starts to confuse her stage roles with her real-life experiences."MB000852", "2327134"

So there's that kind of confusion going on."E2003123", "2450796"

I think that this economic issue should not be confused with the political problem of the Northern Territories.〔【出典】Hiragana Times, 1993年11月号◆【出版社】株式会社ヤック企画 〕"HT085007", "2341459"

In response to these statements, a 21-year-old Japanese man argued that national universities should not be confused with other universities.〔【出典】Hiragana Times, 1998年9月号◆【出版社】株式会社ヤック企画 〕"HT143028", "2363656"

Those who answered "Yes" to the proposal counterargued these opinions, saying that "you cannot confuse marijuana with narcotic drugs."〔【出典】Hiragana Times, 1997年7月号◆【出版社】株式会社ヤック企画 〕"HT129022", "2540127"

To give clear information and encourage clear thinking, never speak or write about "intellectual property";〔【出典】日英対訳文・対応付けデータ（独立行政法人情報通信研究機構）〕"_CONFU", "2542833"

There is also a misunderstanding when, in a situation, people claim that they are telling the truth, but in reality, they are disclosing the secrets of other people unnecessarily by being biased and, in the same way, people mix rudeness with boldness, i.e., they, sometimes, become rude, but, they take it for their boldness.〔【出典】Hiragana Times, 2002年4月号◆【出版社】株式会社ヤック企画 〕"HT186022", "2518025"

be confused with urticaria

Part of that is the fact that Westerners tend to confuse geisha with the yujo and the women in the licensed quarters because, to the untutored eye, they're all just women in white makeup and gorgeous kimono, and you don't make those distinctions."E2003123", "2428989"

likelihood of confusion between the two trademarks

get the two confused

We will still need to decrypt the private key on the client with the pass phrase we used before, but this should not be confused with the pass phrase of the user account on the server.〔【出典】Gentoo Linux ◆【License】CC-BY-SA-2.5 ◆【編集】独立行政法人情報通信研究機構 〕

can stop mixing them up

Americans （and British） confuse that.〔【出典】Hiragana Times, 1996年5月号◆【出版社】株式会社ヤック企画 〕"HT115040", "2243243"

Even if he's using my first name, it seems much more natural for me to call him" Tanaka-san" like everyone else, even though we're mixing cultures."TASTE003", "2291708"

You can be more precise, and prevent confusion, by saying either "distributing copies of a program for a fee" or "imposing proprietary restrictions on the use of a program," depending on what you mean.〔【出典】日英対訳文・対応付けデータ（独立行政法人情報通信研究機構）〕"_CONFU", "2574682"

He says many governments confuse asylum seekers, who are fleeing for their lives, with economic migrants, who are in search of a better future."VOA-A101", "2314257"