How To Convert Simple Text To Bold Using Formula

I have a data example

Cell A1 which contain text I.E = "Words"

I have link B1 To cell A1 I.E = A1

Now what I want is I want the last two words or any alphabet between alphabet
to be bold

W O R D

Example

WORD or WORD

Any alphabet between word to be bold upon my requirement.

Instead of linking that cell to another cell , i want any value when entered into that cell.

That alphabet automatically becomes bold as this will not be requiring linking to that cell