| 100% | GROANS | 6 | [Not again!] and [I can't!] |
| 78% | ITS | 3 | I Can't Believe ___ Not Butter! |
| 74% | OLEO | 4 | I Can't Believe It's Not Butter! product |
| 73% | SPREAD | 6 | I Can't Believe It's Not Butter, e.g. |
| 72% | LET | 3 | "I can't believe I ___ this happen again!" |
| 71% | LALALA | 6 | "___, I can't hear you" ("I'm not listening ..."): 3 wds. |
| 71% | SHAWN | 5 | "If I Can't Have You" and "Señorita" singer Mendes |
| 70% | FABIO | 5 | Onetime spokesmodel for I Can't Believe It's Not Butter |
| 69% | ETC | 3 | ''. . . and I could go on . . .'': Abbr. |
| 69% | FABIO | 5 | Former spokes-hunk for I Can't Believe It's Not Butter |
| 69% | MRS | 3 | ___ Fletcher ("I've fallen, and I can't get up!" speaker) |
| 65% | SEE | 3 | "I can't ___ why not!" |
| 64% | OTHELLO | 7 | "And when I love thee not, / Chaos is come again" speaker |
| 63% | LACKADAISICALLY | 15 | "I can't find a flower for 'She loves me, she loves me not,'" said Tom ___ |
| 62% | OLEO | 4 | "I Can't Believe It's Not Butter" |
| 62% | WHATADEAL | 9 | "I can't afford NOT to buy it!" |
| 61% | DESDEMONA | 9 | The "thee" in Shakespeare's line "But I do love thee! and when I love thee not, / Chaos is come again" |
| 61% | CHEMICALSYMBOLS | 15 | He and I, but not she and you |
| 60% | LOVEDROUGHT | 11 | Beyonce song with the lyric "You and me could make it rain now" |
| 60% | IVE | 3 | "___ said it before and I'll say it again ..." |
| 59% | TOUCH | 5 | Phoebe Robinson's "You Can't ___ My Hair: And Other Things I Still Have to Explain" |
| 59% | ANTIC | 5 | I can't arrange prank |
| 58% | ORNOT | 5 | "Then again, I could be wrong" |
| 58% | SADLYNO | 7 | ''Alas, I can't'' |
| 57% | ABCB | 4 | Scheme for Dickinson's "Because I could not stop for Death" |
| 57% | DENIALS | 7 | "Not me!" and "I didn't do anything!" |
| 57% | ARE | 3 | It can follow you but not me? |
| 57% | COATING | 7 | I can't go off outer layer |
| 57% | SATANIC | 7 | I can’t, as it turns devilish |
| 57% | REGRETS | 7 | "Sorry, I can't come" |