Oil source
The crossword clue "Oil source" is answered by SHALE, a 5-letter entry. Used 48 times across 24 distinct years; most recently in 2021; first recorded in 1971. It appears in 12 publications in the xd corpus. Every figure on this page comes from the collection data itself.
The answer
SHALE
5 letters. See every clue for this answer on the SHALE answer page.
Used 48 times across 24 distinct years; most recently in 2021; first recorded in 1971. It appears in 12 publications in the xd corpus. Frequency and last-seen figures come from the xd crossword corpus only.
Other answers for this clue
The same clue has also been answered these ways in the xd corpus. Answers inside this collection link to their own answer page.
- CORN (6 uses in xd)
Other clues for SHALE
Every other clue in this collection answered by SHALE, most used first.
- Layered rock - used 51 times, most recently in 2026
- Fissile rock - used 48 times, most recently in 2025
- Sedimentary rock - used 28 times, most recently in 2025
- Oil-bearing rock - used 27 times, most recently in 2026
Related clues
Clues in this collection of the same answer length that share a word with this clue, or match its answer pattern when no word is shared. Most used first.
- Chocolate source - CACAO, used 153 times
- Tequila source - AGAVE, used 95 times
- Rose oil - ATTAR, used 91 times
- Syrup source - MAPLE, used 84 times
- Down source - EIDER, used 62 times
- Fragrant oil - ATTAR, used 59 times
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