Which to use
“spec” and “stem” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #13,245
- “spec” frequency rank
- #4,336
- “stem” frequency rank
- 17581
- confusion score
Side-by-Side Comparison
| Feature | spec | stem |
|---|---|---|
| Definition | Clipping of specification. | The stock of a family; a race or generation of progenitors. |
Where the eye mixes spec and stem
Muted = shared; highlighted = the visual trap. They share 2 letters in sequence.
Why the eye confuses spec with stem
A purely visual mix-up. spec (/ˈspɛk/) and stem (/stɛm/) are said differently, so reading them aloud is the quickest way to catch the wrong one. On the page they stay close: they share most of their letters but differ in 2 positions. Our composite confusion score for this pair is 17581, derived from the frequency rank of both members and their visual similarity.
spec is recorded at frequency rank #13,245, classified as anoun, pronounced /ˈspɛk/. stem is at rank #4,336, tagged as anoun, pronounced /stɛm/.
Glosses for this pair are partially populated in our dataset, but the full side-by-side definitions above should still guide you to the right choice.
With a confusion score of 17581, this pair ranks #450,461 of 530,003 scored English confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of spec vs stem
Shared letters: es. Private to "spec": cp. Private to "stem": mt.
"spec" · 4 letters · shape CCVC · "stem" · 4 letters · shape CCVC
Known mistypes of this pair
Frequently Asked Questions
Can "spec" and "stem" be used interchangeably?
Which is more common, "spec" or "stem"?
After this comparison
Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.
- Full dictionary entry for "spec" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "stem" - compare definitions side by side with the headword page. Word entry
- This pair ranks #450,461 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "spec" and "stem" also get mixed up with nearby pairs, the highest-scored neighbour is "sez vs spec". Nearby pair
- Recorded mistypes exist for at least one side of this pair, useful when a spell-checker or OCR lands on the wrong form. See mistypes
Confusion rank #450,461 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.