| Acid used as a preservative | 27 |
| Acid used as an antiseptic | 26 |
| Acid used in antiseptics | 24 |
| Acid used in antiseptics: Comb. form | 36 |
| Acid used in fertilizers and explosives | 39 |
| Acid used in food preservatives | 31 |
| Acid used in insecticides | 25 |
| Acid used in making soap | 24 |
| Acid used in soap | 17 |
| Acid used in soap-making | 24 |
| Acid used in some trips | 23 |
| Acid used to make soap | 22 |
| Acid used to stain microscope slides | 36 |
| Acid user | 9 |
| Acid __ | 7 |
| Acid ___ | 8 |
| Acid's opposite | 19 |
| Acid's quality, in an acid test | 35 |
| Acid, at times | 14 |
| Acid, e.g. | 10 |
| Acid, in the 60's | 21 |
| Acid-alcohol compound | 21 |
| Acid-alcohol compounds | 22 |
| Acid-alcohol derivative | 23 |
| Acid-burned Bat-villain | 23 |
| Acid-forming | 12 |
| Acid-neutralizing base | 22 |
| Acid-neutralizing compound | 26 |
| Acid-test group? | 16 |
| Acid-test paper | 15 |
| Acid-testing paper | 18 |
| Acid-tongued | 12 |
| Acid-tongued "American Idol" judge | 44 |
| Acid/alcohol compound | 21 |
| Acid: Abbr. | 11 |
| Acid: Comb. form | 16 |
| Acidhead's drug | 19 |
| Acidhead's problem | 22 |
| Acidic | 6 |
| Acidic forest earth | 19 |
| Acidic prefix | 13 |
| Acidic solidifying point | 24 |
| Acidic, in Augsburg | 19 |
| Acidic, to a chemist | 20 |
| Acidic-tasting | 14 |
| Acidity | 7 |
| Acidity after gluttony | 22 |
| Acidity detector | 16 |
| Acidity factor | 14 |
| Acidity levels: Abbr. | 21 |
| Acidity measures | 16 |
| Acidity measures, informally | 28 |
| Acidity nos. | 12 |
| Acidity or alkalinity | 21 |
| Acidity or alkalinity measurement, which is literally 8 for this puzzle's four longest answers | 98 |
| Acidity tester | 14 |
| Acidity, in medicine | 20 |
| Acidity, to an M.D. | 19 |
| Acidity-level symbols | 21 |
| Acidity-measuring device | 24 |
| Acidulous | 9 |
| Acier ingredient | 16 |
| Ack-ack | 7 |
| Ackbar is one in "Return of the Jedi" (abbr.) | 55 |
| Ackerman who portrayed Evita on Broadway | 40 |
| Acknowledge | 11 |
| Acknowledge a commander's entrance, maybe | 45 |
| Acknowledge a passerby | 22 |
| Acknowledge a stimulus | 22 |
| Acknowledge an acquaintance | 27 |
| Acknowledge an invitation | 25 |
| Acknowledge an ovation | 22 |
| Acknowledge an R.S.V.P. | 23 |
| Acknowledge anew | 16 |
| Acknowledge applause | 20 |
| Acknowledge applause, perhaps | 29 |
| Acknowledge appreciatively | 26 |
| Acknowledge as true | 19 |
| Acknowledge as true, as a crime | 31 |
| Acknowledge defeat | 18 |
| Acknowledge frankly | 19 |
| Acknowledge from across the room | 32 |
| Acknowledge in an Oscar speech | 30 |
| Acknowledge in passing | 22 |
| Acknowledge mistletoe overhead | 30 |
| Acknowledge nonverbally | 23 |
| Acknowledge one's fans | 26 |
| Acknowledge openly | 18 |
| Acknowledge quietly | 19 |
| Acknowledge reluctantly | 23 |
| Acknowledge silently | 20 |
| Acknowledge tacitly | 19 |
| Acknowledge the applause | 24 |
| Acknowledge the audience | 24 |
| Acknowledge the band | 20 |
| Acknowledge the bride | 21 |
| Acknowledge the crowd | 21 |
| Acknowledge the judge | 21 |
| Acknowledge the judge's arrival | 35 |
| Acknowledge the judge's entrance | 36 |