| Old Irish tongue: Var. | 22 |
| Old Irish tongue | 16 |
| Old Irish tenant | 16 |
| Old Irish stronghold | 20 |
| Old Irish soc. | 14 |
| Old Irish script | 16 |
| Old Irish oath | 14 |
| Old Irish levies | 16 |
| Old Irish letters | 17 |
| Old Irish hunting knife | 23 |
| Old Irish garment | 17 |
| Old Irish frock | 15 |
| Old Irish fort | 14 |
| Old Irish daggers | 17 |
| Old Irish dagger | 16 |
| Old Irish capital | 17 |
| Old Irish alphabetic system | 27 |
| Old Irish alphabet: Var. | 24 |
| Old Irish alphabet system | 25 |
| Old Irish alphabet | 18 |
| Old Irish | 9 |
| Old Iranian VIP | 15 |
| Old Iranian rulers | 18 |
| Old Iranian ruler | 17 |
| Old Iranian monarchs | 20 |
| Old Iranian leaders | 19 |
| Old Iranian leader | 18 |
| Old Iran | 8 |
| Old iPod Nano capacity | 22 |
| Old intro to "long" or "now" | 48 |
| Old intoxicating elixirs | 24 |
| Old Intellivision rival | 23 |
| Old Intellivision competitor | 28 |
| Old intelligence org. | 21 |
| Old intelligence gp. | 20 |
| Old intelligence agcy. | 22 |
| Old insulating mat'l. | 25 |
| Old instrument that's strummed | 34 |
| Old instrument of torture, briefly | 34 |
| Old instrument of punishment | 28 |
| Old instrument for removing tonsils | 35 |
| Old instrument | 14 |
| Old Insomnium song, with "The"? | 41 |
| Old insecticide | 15 |
| Old innkeeper | 13 |
| Old inits. in telecommunications | 32 |
| Old inits. in telecommunication | 31 |
| Old inits. in tele-communications | 33 |
| Old information? | 16 |
| Old infomercial brand | 21 |
| Old info | 8 |
| Old infantry spears | 19 |
| Old infantry soldier armed with a spear | 39 |
| Old infantry soldier | 20 |
| Old indoor light source | 23 |
| Old Indochina area | 18 |
| Old Indic lang. | 15 |
| Old Indic dialect | 17 |
| Old Indianapolis-based automaker | 32 |
| Old Indian weight | 17 |
| Old Indian V.I.P. | 17 |
| Old Indian term of respect | 26 |
| Old Indian ruler | 16 |
| Old Indian rule | 15 |
| Old Indian leader | 17 |
| Old Indian infantryman | 22 |
| Old Indian honorific | 20 |
| Old Indian dominion | 19 |
| Old Indian culture of Southwest | 31 |
| Old Indian coins | 16 |
| Old incarnations | 16 |
| Old import tax | 14 |
| Old imperator | 13 |
| Old ideological rival | 21 |
| Old Icelandic writings | 22 |
| Old Icelandic work | 18 |
| Old Icelandic saga | 18 |
| Old Icelandic poetry | 20 |
| Old Icelandic poems | 19 |
| Old Icelandic literature | 24 |
| Old Icelandic literary work | 27 |
| Old Icelandic literary collection | 33 |
| Old ice cream slogan, to ancient Romans | 39 |
| Old IBM products | 16 |
| Old IBM PCs | 11 |
| Old IBM PC's | 16 |
| Old IBM offering | 16 |
| Old IBM models | 14 |
| Old IBM computers | 17 |
| Old Iberian kingdom | 19 |
| Old hymn, "Te ___" | 28 |
| Old hwy. from Detroit to Seattle | 32 |
| Old hunting dog | 15 |
| Old humorist ___ Burgess | 24 |
| Old humor magazine | 18 |
| Old hull caulking | 17 |
| Old Hudson auto | 15 |
| Old Houston pro | 15 |
| Old Houston hockey team | 23 |
| Old Houston gridder | 19 |