Seamless PDF Text Replacement

I have a PDF where several specific words need to be swapped for new ones. Every replacement must blend perfectly—same font, size, colour, kerning, and alignment—so the final document looks completely untouched... (Budget: $10 - $30 USD, Jobs: Adobe Acrobat, Adobe Creative Cloud, Graphic Design, Illustrator, PDF, Photoshop, Print Design, Visual Design)