Is there a potential downside? Yes. Just because a search engine sees something as Creative Commons doesn’t necessarily mean that it is. Here at MakeUseOf, for example, we’ve had at least one photographer threaten to sue us over an image he didn’t realize he himself licensed as Creative Content. He backed down when we pointed this out, and it’s one example resulting from thousands of blog posts spread over a decade, but know that this isn’t without risk.
If you mean your own artwork, then you'd take a picture of it, upload it to your computer (make sure you know where you're saving it), then select Insert > Picture in Word, browse in the location where you saved the photo, click the picture, and insert. If you mean an image from the internet or something, you can just save it to your computer and basically follow the rest of the steps above.
As an artist I resent some people's assumption that original art from my abilities and imagination, which I have sacrificed a lot to develop, should somehow default to public property. If we require artists to participate in a money economy their art belongs to them. Copying images and not following the copyright owners permissions to the letter is stealing, outright. And deep pockets like Disney has taught individuals that the hard way.
Español: agregar Clip Art a Microsoft Word, Italiano: Aggiungere Clip Art in Microsoft Word, Русский: вставить клипарт в Word, Português: Inserir Cliparts em um Documento do Microsoft Word, Deutsch: ClipArt zu Microsoft Word hinzufügen, Bahasa Indonesia: Menambahkan ClipArt ke Microsoft Word, Français: insérer des cliparts dans un document Word, Nederlands: Clipart toevoegen aan Microsoft Word, العربية: إدراج صورة كليب آرت في مستند مايكروسوفت وورد