| 100% | TBA | 3 | "We'll let you know later" |
| 97% | TBA | 3 | "We'll let you know later" letters |
| 82% | YET | 3 | "I haven't decided ___" ("I'll let you know later") |
| 76% | TBA | 3 | "We'll let you know," on skeds |
| 72% | TBA | 3 | Letters on a schedule meaning "We'll let you know" |
| 62% | ABLE | 4 | "Let us know if you'll be ___ to attend" |
| 61% | NERVEENDINGS | 12 | They'll let you know when you're in hot water |
| 61% | AREA | 4 | "I'll let you know next time I'm in the ___!" |
| 61% | RSVP | 4 | "Please let us know if you're coming" letters |
| 61% | RSVP | 4 | "Please let us know if you're coming" abbreviation |
| 60% | ICANT | 5 | "I'll let you know if ___ make it on time.": 2 wds. |
| 59% | ILL | 3 | "__ let you know" |
| 59% | ILL | 3 | "___ let you know" |
| 57% | ILL | 3 | "___ let you know what happens" |
| 56% | ILL | 3 | "___ have to let you know" |
| 55% | TBACOLA | 7 | "We'll tell you what soda we're serving later"? |
| 55% | TBA | 3 | "When we know, you'll know": Abbr. |
| 55% | PAGERS | 6 | They let you know you're wanted |
| 55% | ABLE | 4 | "Let us know if you're ___ to attend" |
| 55% | RSVP | 4 | "Let us know if you're coming" initials |
| 55% | RSVP | 4 | "Let us know if you're coming" letters |
| 55% | RSVP | 4 | "Let us know if you're coming": Abbr. |
| 55% | RSVP | 4 | “Let us know if you’re attending” letters |
| 55% | FYI | 3 | Memo starter (Just letting you know): Abbr. |
| 55% | FYI | 3 | "Just letting you know" in chatspeak: Abbr. |
| 53% | RATTLER | 7 | One letting you know before going for a bite? |
| 50% | ONEOCAT | 7 | You know how we used to play the baseball variant ___? ...
|
| 50% | OGLE | 4 | Let someone know you're interested |
| 49% | ESP | 3 | Purported ability that could let you know what someone else is thinking: Abbr. |
| 49% | RSVPED | 6 | Let someone know if you can go |