| Text | Length |
| Iron Age Europeans | 18 |
| Irish people | 12 |
| Irish of old | 12 |
| Irish folk | 10 |
| Irish and Gaels | 15 |
| Gaels, etc. | 11 |
| Founders of Milan | 17 |
| European ancients | 17 |
| Early Europeans | 15 |
| Early Britishers | 16 |
| Druids' followers | 21 |
| Cornishmen | 10 |
| Bretons and Welsh | 17 |
| Bretons and Britons | 19 |
| Boston players, briefly | 23 |
| Boston NBAers | 13 |
| Boston hoopsters, for short | 27 |
| Boston Garden heroes, to their fans | 35 |
| Boston five | 11 |
| Boston cagers, informally | 25 |
| Bob Cousy's team, for short | 31 |
| Bird's team, briefly | 24 |
| Bird and others, once | 21 |
| Beantown five, informally | 25 |
| Ancient axes | 12 |
| 17-time NBA champs | 18 |
| Fuses | 5 |
| Binds | 5 |
| Unites firmly | 13 |
| Joins firmly | 12 |
| Establishes firmly | 18 |
| Bonds, in a way | 15 |
| Attaches securely | 17 |
| Locks in | 8 |
| Locks down | 10 |
| Joins, as stones in a wall | 26 |
| Glue relatives | 14 |
| Forms a bond | 12 |
| Connects solidly | 16 |
| Bonds securely | 14 |
| Bonds firmly | 12 |
| Bonds a filling | 15 |
| Binds together | 14 |
| Storyboard for "Poltergeist"? | 39 |
| Recent: Prefix | 14 |
| 100 yrs. | 8 |
| Recent: Comb. form | 18 |
| Time period: Abbr. | 18 |
| Mid. | 4 |
| Fivescore yrs. | 14 |
| Long time: Abbr. | 16 |
| 100-yr. period | 14 |
| Time span: abbr. | 16 |
| One hundred yrs. | 16 |
| Millennium div. | 15 |
| Five score yrs. | 15 |
| Time line period: Abbr. | 23 |
| The 21st, e.g.: Abbr. | 21 |
| Part of a millennium (abbr.) | 28 |
| Many yrs. | 9 |
| In the middle: Abbr. | 20 |
| 21st, e.g.: Abbr. | 17 |
| 2000s, e.g.: Abbr. | 18 |
| 100 years: Abbr. | 16 |
| What few people live for: Abbr. | 31 |
| The 900's, e.g.: Abbr. | 26 |
| The 1900's, e.g.: Abbr. | 27 |
| The 1000's, e.g.: Abbr. | 27 |
| Ten decades, for short | 22 |
| One-tenth of a millennium (abbr.) | 33 |
| Noted arcade classic, and this puzzle's theme | 49 |
| Near the middle: Abbr. | 22 |
| Midmost: Abbr. | 14 |
| MCMI to MM, e.g. | 16 |
| Life span of many a tortoise (abbr.) | 36 |
| Hundred yrs. | 12 |
| Eon component: abbr. | 20 |
| Div. of time | 12 |
| Decimal meas. | 13 |
| Cook fish Cajun-style | 21 |
| About 877,000 hrs. | 18 |
| A.D. 1–A.D. 100, e.g. | 28 |
| A new one comes every 100 yrs. | 30 |
| 800s, e.g.: Abbr. | 17 |
| 20th, e.g.: Abbr. | 17 |
| 1900s, e.g.: Abbr. | 18 |
| 1900-99, e.g.: Abbr. | 20 |
| 1800's, e.g.: Abbr. | 23 |
| 1776-1876: Abbr. | 16 |
| 100th anniv. | 12 |
| 100-yr. timespan | 16 |
| 100-yr. stretch | 15 |
| 100-yr. span | 12 |
| 100-year time span (Abbr.) | 26 |
| Prefix with -zoic | 17 |
| Prefix meaning recent | 21 |
| Prefix with "zoic" | 28 |
| The current "-zoic" | 29 |
| Relative of neo | 15 |
| Recent (Pref.) | 14 |
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