| 100% | BIRCH | 5 | Tree with bark that's used to build canoes and wigwams |
| 48% | BIRCH | 5 | Tree whose 1-Down was used to make canoes and wigwams |
| 48% | TEAK | 4 | Wood that is used to build ships and furniture (rhymes with "weak) |
| 41% | TEAK | 4 | Wood that is used to build ships and furniture |
| 37% | BRANCH | 6 | Tree "limb" ... and a word used with 17a to signify 50a |
| 36% | SOY | 3 | Bean that's used to make nondairy milk and tofu |
| 36% | BIRCH | 5 | Wood from a light-colored tree with a papery bark, used for making canoes (rhymes with "lurch") |
| 36% | SAP | 3 | Tree fluid that's used to make maple syrup |
| 36% | PINE | 4 | Softwood from a tree with cones and needles, that may be used for making cabinets and frames |
| 36% | MYRRH | 5 | Tree of Africa and S Asia that exudes a resin used in perfume and medicine |
| 35% | ELM | 3 | Tree that's susceptible to bark beetles |
| 34% | ALT | 3 | Key that's often used with Control and Delete |
| 34% | POPLAR | 6 | Tree that's related to the aspen and cottonwood |
| 33% | YEW | 3 | Tree with poisonous needles, berries, and bark |
| 33% | NUTPINE | 7 | Tree with seeds used to make pesto |
| 33% | TAMARIND | 8 | Tree with pods used to flavor agua fresca |
| 33% | ASPHALT | 7 | Material that can be used to secure plant graftings and seal tree wounds |
| 32% | PARAGLIDING | 11 | Adventure sport that requires a pilot to be suspended to a fabric wing with harness, and fly using air pressure |
| 32% | CHAMOMILE | 9 | Plant with medicinal flowers that's used to make tea |
| 32% | YEWS | 4 | Trees with edible berries (but toxic leaves and bark) |
| 32% | ELM | 3 | Tree with serrated leaves that taper to a point |
| 32% | ELDER | 5 | Tree with white or pink flowers used to make syrup |
| 32% | DRUMROLLS | 9 | Percussion sounds that are used to build excitement |
| 32% | SYCAMORE | 8 | Shade tree with peeling bark and sweet sap |
| 32% | TNG | 3 | Medication often used to treat heart conditions that's available in tablets, sprays, ointments and patches (abbr.) |
| 32% | WINWINSITUATION | 15 | Circumstance that's good for everyone ... with a hint to 17-, 25- and 44-Across |
| 31% | FLAG | 4 | Nation's "waving" symbol ... and a word used with 23a to signify 50a |
| 31% | HAND | 4 | What's used in a high five ... and a word used with 38a to signify 50a |
| 31% | GENDER | 6 | With 43-Across, something that escapes certain categories, and a hint to this puzzle's theme |
| 31% | BALL | 4 | ___ of snow, rolled object used to build the head and body of a snowman |