Sorry for not understanding, but you did say word...
You'd probably convert it then into a JPEG image which is compressed, while bitmap isn't.
Simply go into Paint in accessories, load up the bitmap image, and go to save as, and call it a different name, and select the 'Save as type' to JPEG (jpg).
The file size will be reduced dramatically and you'll be able to send it no probs
The file quality will not be reduced that much either, though like an MP3 file, quality will drop a minor amount depending on the colours/blends used.
Don't worry though, you see loads of Jpeg images on the web for instance.