I'm looking for one word (or a variety of words) that imply ambiguity through synonymous meaning.

"Do you have that in large?"

"No sir, we only have it in big, great, impressive, grand, and king-sized"

The closest I have are "double-entendre" and "heteronym", but neither is quite right: double-entendre tends to relate to smutty puns, and heteronymic(?) words have to be spelled the same.