9-letter words starting with si
- sixteenth — next after the fifteenth; being the ordinal number for 16.
- sixth man — a team's best substitute.
- sixtus ii — Saint, died a.d. 258, pope 257–258.
- sixtus iv — (Francesco della Rovere) 1414–84, Italian ecclesiastic: pope 1471–84.
- sixty-odd — around sixty; approximately sixty (people or things)
- sixty-one — a cardinal number, 60 plus 1.
- sixty-six — a cardinal number, 60 plus 6.
- sixty-two — a cardinal number, 60 plus 2.
- size zero — a very small size in women's clothes, originating in the US, equivalent to a UK size 4