| Letters of electrical flexibility | 33 |
| Letters of evidence | 19 |
| Letters of faux modesty | 23 |
| Letters of gratitude, in a text | 31 |
| Letters of haste | 16 |
| Letters of indebtedness | 23 |
| Letters of indecision, on a schedule | 36 |
| Letters of introduction | 23 |
| Letters of invitation | 21 |
| Letters of invitation? | 22 |
| Letters of logic | 16 |
| Letters of note? | 16 |
| Letters of obligation | 21 |
| Letters of patent? | 18 |
| Letters of payback | 18 |
| Letters of proof | 16 |
| Letters of recommendation | 25 |
| Letters of rejoicing | 20 |
| Letters of relief | 17 |
| Letters of request for some patients | 36 |
| Letters of royalty | 18 |
| Letters of satisfaction | 23 |
| Letters of self-responsibility | 30 |
| Letters of sizes | 16 |
| Letters of some urgency | 23 |
| Letters of success | 18 |
| Letters of surprise, in text messages | 37 |
| Letters of texted appreciation | 30 |
| Letters of the alphabet | 23 |
| Letters of the past | 19 |
| Letters of transit? | 19 |
| Letters of triumph | 18 |
| Letters of uncertainty | 22 |
| Letters of urgency | 18 |
| Letters of Zeno | 15 |
| Letters of ___ | 14 |
| Letters often delivered at the office | 37 |
| Letters often followed by a dollar amount | 41 |
| Letters often followed by a number | 34 |
| Letters often rolled in brogue | 30 |
| Letters often seen after @ | 26 |
| Letters often seen under antlers | 32 |
| Letters on a "Most Wanted" poster | 43 |
| Letters on a "Welcome to" sign | 40 |
| Letters on a 7" | 20 |
| Letters on a B-2 | 16 |
| Letters on a B-52 | 17 |
| Letters on a bad check | 22 |
| Letters on a bank window | 24 |
| Letters on a bank's door | 28 |
| Letters on a battery terminal | 29 |
| Letters on a battleship | 23 |
| Letters on a beach bottle | 25 |
| Letters on a beer-thieving roommate's note | 46 |
| Letters on a billet-doux's envelope | 39 |
| Letters on a boom box | 21 |
| Letters on a bounced check | 26 |
| Letters on a box score | 22 |
| Letters on a brandy bottle | 26 |
| Letters on a brown shirt | 24 |
| Letters on a bucket | 19 |
| Letters on a bumper sticker | 27 |
| Letters on a business card | 26 |
| Letters on a business office stamp | 34 |
| Letters on a camcorder button | 29 |
| Letters on a Camden Yards' scoreboard | 41 |
| Letters on a can of motor oil | 29 |
| Letters on a car sticker | 24 |
| Letters on a Cardinal | 21 |
| Letters on a Cardinal cap | 25 |
| Letters on a Cardinal's cap | 31 |
| Letters on a Cardinal's hat | 31 |
| Letters on a Cardinals cap | 26 |
| Letters on a Cardinals' cap | 31 |
| Letters on a carrier | 20 |
| Letters on a cell button | 24 |
| Letters on a cereal box | 23 |
| Letters on a certain key | 24 |
| Letters on a certain phone button | 33 |
| Letters on a certain stamp | 26 |
| Letters on a charcoal sack | 26 |
| Letters on a chasuble | 21 |
| Letters on a chit | 17 |
| Letters on a Cognac bottle | 26 |
| Letters on a converter | 22 |
| Letters on a Coppertone bottle | 30 |
| Letters on a Crest tube | 23 |
| Letters on a cross | 18 |
| Letters on a crucifix | 21 |
| Letters on a debtor's slip | 30 |
| Letters on a Delorean | 21 |
| Letters on a destroyer | 22 |
| Letters on a dumbbell | 21 |
| Letters on a farm? | 18 |
| Letters on a fax button | 23 |
| Letters on a flattop | 20 |
| Letters on a Florsheim box | 26 |
| Letters on a food label | 23 |
| Letters on a food stamp | 23 |
| Letters on a food stamp? | 24 |