| Large and scholarly book |
TOME |
| Last in a series |
ULTIMATE |
| Make larger or longer |
EXTEND |
| Makes sure a law is observed |
ENFORCES |
| On an undetermined date in the future |
SOMETIME |
| Order, command |
ENJOIN |
| Outer edge of a settled territory |
FRONTIER |
| Plant that lives and dies within one year |
ANNUAL |
| Rubbing out |
ERASING |
| Saying very little |
TACITURN |
| Sets of railway cars |
TRAINS |
| Son of a sovereign |
PRINCE |
| The Abominable Snowman |
YETI |
| Threatening, portending tragedy |
OMINOUS |
| Use the wrong letters |
MISSPELL |
| Using exactly the same words |
VERBATIM |