words validation for a Text Box

[sam12122]

I have import my dictionary to power app as list about 8000 words

if my dictionary is 'abcd' and my textbox is 'abcd123'
how can I find value in textbox
I had try Match  

[eka24]

You can validate using the Fill color of the TextBox:

If(Self.Text exactin TableName.Column,Green,Red)

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[sam12122]

Thank you for your answer,
there is a problem,
if my dictionary is 'abcd' and my textbox is 'abcd123'
it will not turn red

[eka24]

From your description  'abcd' is not same as 'abcd123' so turning red is ok.

You can change the formula to:

If(Self.Text in TableName.Column,Green,Red)

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[sam12122]

Oh sorry I type wrong, 
It will not turn green. 

[eka24]

Kindle show the your formula, also screenshot of your table column with the "abcd".

It not clear to me what you want to do with 'abcd' and 'abcd123'

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[sam12122]

I want do a Illegal words validation when user typing password