2001.01.12 22:52 "Re: What is the proper number of bytes in a TIFF 6.0 "word"", by Dave Abercrombie
If you look at figure 1 (page 14 of the spec), I think it is clear that a "word" is meant to be a 2 byte quantity, though the spec doesn't define this term.
What is your interpretation of clear. The "word" alignment corresponds to the value termed "A" in Figure 1, but there's nothing to show that "A" is aligned on a 2-byte boundary.
If, however, the fact that all parcels of information seem to be in 2-byte blocks, then you might be right. But one could only imply from the fact that all of their little boxes are 2-byte boxes, whether filled in with solid or dashed lines.