| understruction | |
| understructure | |
| verge | |
| window frame | |
| windowsill | |
| argent | |
| bagginess(noun, tuberosity) | |
| beacon(noun, shaft, timber, rafter, girder) | |
| beanbag(noun, cushion) | |
| bearing ball(expression, idiom) | |
| beginning | |
| berm(noun, projection, ridge, rack, shelf) | |
| big marble(expression, idiom) | |
| billiard ball(expression, idiom) | |
| blacks and whites(noun, expression, idiom, mantelpiece, claviature) | |
| blow | |
| bombshell | |
| bookshelf | |
| bulge(noun, ridge, shelf, protuberance, outcrop) | |
| bumper(noun, cushion, beanbag) |
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| APA | Smart Define. (2015). sill thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/sill/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "sill thesaurus" https://smartdefine.org/sill/thesaurus/synonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2015, sill thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/sill/thesaurus/synonyms>. |
| MLA | Smart Define. "sill thesaurus" 10 April 2015. Web. 23 September 2026. <https://smartdefine.org/sill/thesaurus/synonyms> |