Extra
Extra noun - Something adding to pleasure or comfort but not absolutely necessary.
Usage example: the motel is clean and comfortable, but there are no extras
Must
Must noun - Something necessary, indispensable, or unavoidable.
Usage example: exercise is a must if you want to stay healthy
How words are described
| unimportant | unimportant extra | unimportant must |
| poor | poor extra | poor must |
| big | big extra | big must |
| bad | bad extra | bad must |
| Other adjectives: main, few, occasional, optional. | ||
Both words in one sentence
- This causes them to fight amongst themselves to see who the extra hero is, assuming that person must be there to sabotage them.
Source: One Extra Member -
And then of course, there's the entire business with Patriot... Nitro Boost: An optional extra, but a must for one mission in which you must jump a particularly wide chasm.
Source: Video Game / Interstate '76 -
All makers of police database software must put extra effort in making the user interface have pizazz.
Source: Viewer-Friendly Interface
Cite this Source
Must and Extra. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/extra/must
Extra & Must. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/extra/must>.
Must or Extra. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/extra/must.
Google Ngram Viewer shows how "extra" and "must" have occurred on timeline