Explore Movie Vocabulary
Learn English with movies. Discover how much of a movie’s vocabulary you already know and review unfamiliar words before watching.

Plan 9 from Outer Space
Unique vocabulary and phrases by level
How difficult is Plan 9 from Outer Space in English?
Plan 9 from Outer Space: 67.2% A1–A2 vocabulary; 15.4% B2, C1, and rare vocabulary. Vocabulary size: 1,094.
Unique vocabulary
- For A2 learners: 25.6% of unique vocabulary is above A2 or marked rare. Expect substantial preparation; start with short scenes and English subtitles.
- For B1 learners: 15.4% of unique vocabulary is above B1 or marked rare. Preview recurring words and use English subtitles.
- For B2 learners: 9.8% of unique vocabulary is above B2 or marked rare. Try a short scene and check your comprehension; the vocabulary offers a relatively accessible starting point.
7.2% Unclassified. Unclassified vocabulary has no reliable level assignment.
Vocabulary weighted by word occurrences
91.1% A1–A2 vocabulary; 4.1% B2, C1, and rare vocabulary; 1.6% Unclassified.
This counts repeated eligible words. Phrases are excluded from this calculation to avoid counting their component words twice.
Recurring words and phrases to preview
- saucer (rare): 23 occurrences in available subtitles.
Subtitle example:
flying saucers high over Hollywood Boulevard.
- planet (B1): 14 occurrences in available subtitles.
Subtitle example:
And to all the planets that sunlight touches.
- clay (B1): 13 occurrences in available subtitles.
Subtitle example:
Minutes later, the police, lead by Inspector Daniel Clay,
- grave (B2): 11 occurrences in available subtitles.
Subtitle example:
can your heart stand the shocking facts about grave robbers
- cemetery (C1): 10 occurrences in available subtitles.
Subtitle example:
the cemetery. A lot of police cars and lights. I stopped but I didn't see anything.
Compare with titles in similar genres
- Videodrome: 15.4% B2, C1, and rare vocabulary (0.0 percentage points less than Plan 9 from Outer Space).
- Night of the Comet: 15.4% B2, C1, and rare vocabulary (0.0 percentage points less than Plan 9 from Outer Space).
- Alien Resurrection: 15.5% B2, C1, and rare vocabulary (0.1 percentage points more than Plan 9 from Outer Space).
These percentages describe vocabulary, not the proportion of dialogue you will understand. CEFR labels are estimates, not official film ratings. Accent, speed, songs, context, and your own vocabulary also affect comprehension. Repeated occurrences may include repeated dialogue or lyrics.
How we estimate vocabulary difficulty · Evidence generated: