| BACKCROSSED | • backcrossed v. Simple past tense and past participle of backcross. • BACKCROSS v. to create a cross between a hybrid and a parent. |
| BACKCROSSES | • backcrosses n. Plural of backcross. • backcrosses v. Third-person singular simple present indicative form of backcross. • back-crosses n. Plural of back-cross. |
| BACKSTORIES | • backstories n. Plural of backstory. • back-stories n. Plural of back-story. • back␣stories n. Plural of back story. |
| BACKSTROKES | • backstrokes n. Plural of backstroke. • backstrokes v. Third-person singular simple present indicative form of backstroke. • BACKSTROKE v. to swim on the back. |
| BLOCKHOUSES | • blockhouses n. Plural of blockhouse. • BLOCKHOUSE n. a wooden or concrete fortification with ports or loopholes for defensive fire, observation, etc. |
| BLOODSTOCKS | • bloodstocks n. Plural of bloodstock. • BLOODSTOCK n. horses of thoroughbred breeding. |
| BROOMSTICKS | • broomsticks n. Plural of broomstick. • broomsticks v. Third-person singular simple present indicative form of broomstick. • BROOMSTICK n. the long thin handle of a broom. |
| COURSEBOOKS | • coursebooks n. Plural of coursebook. • COURSEBOOK n. a book used on an educational course. |
| SCHOOLBOOKS | • schoolbooks n. Plural of schoolbook. • school␣books n. Plural of school book. • SCHOOLBOOK n. a school textbook. |
| SKETCHBOOKS | • sketchbooks n. Plural of sketchbook. • sketch␣books n. Plural of sketch book. • SKETCHBOOK n. a book of or for sketches. |
| SOURCEBOOKS | • sourcebooks n. Plural of sourcebook. • SOURCEBOOK n. a book of original documents for (esp. historic) study. |
| SUPERBLOCKS | • superblocks n. Plural of superblock. • SUPERBLOCK n. a large block composed of other blocks. |
| SWATCHBOOKS | • SWATCHBOOK n. a collection of swatches bound together in book form. |