Simile vs Metaphor
A simile compares two things using the words like or as. A metaphor compares two things directly, calling one thing the other without those signal words. Both are forms of figurative language; the difference is whether the comparison is signposted (simile) or implied (metaphor).
Last reviewed on 2026-04-27.
Quick Comparison
| Aspect | Simile | Metaphor |
|---|---|---|
| Comparison signal | "like" or "as" | Direct — no signal words |
| Example | Her smile was like sunshine. | Her smile was sunshine. |
| Effect | Explicit comparison; reader sees both terms | Implicit identification; image is one thing |
| Common in | Speech, descriptive writing, song lyrics | Poetry, essays, slogans, journalism |
| Closely related | Both are types of comparison (analogy) | Both are types of comparison (analogy) |
| Distance from literal | Closer — preserves the difference | Further — collapses the two into one |
Key Differences
1. Signal words
A simile includes like or as to mark the comparison: "as brave as a lion," "like a kid in a candy store."
A metaphor drops the signal words and presents the comparison directly: "He is a lion." "She is the candy store, all on her own."
2. The effect
A simile keeps both terms visible. The reader sees that smile and sunshine are different things being compared. The image stays explicit and slightly held at arm's length.
A metaphor collapses the comparison. The reader is asked to perceive one thing as the other for a moment. "Her smile was sunshine" doesn't say her smile was like sunshine — it claims the identity. The image is more direct, sometimes more startling.
3. Worked examples
Similes: "Life is like a box of chocolates." "He fought like a tiger." "Her voice was as smooth as silk." "As dead as a doornail."
Metaphors: "All the world's a stage." "Time is money." "Drowning in paperwork." "He has a heart of stone."
4. Some metaphors are extended
Simple metaphors land in a single phrase: "a sea of troubles."
Extended metaphors run for sentences or whole passages: a poem developing the comparison "life is a journey" through hills, valleys, weather, companions, and so on.
5. Mixed metaphors
Similes rarely mix oddly because the "like" or "as" keeps each comparison visible.
Metaphors can collide if you stack incompatible ones: "That ship has sailed; we'll have to bite the bullet and grasp the bull by the horns." Each phrase is fine; together they're a chaotic image.
6. When to use which
Similes work well for clarity, gentle humour, and when you want the reader to see the comparison being made.
Metaphors can be more powerful and more economical, but they ask more of the reader. Strong metaphors stay with people; weak ones can feel forced.
When to Choose Each
Choose Simile if:
- Speech and casual writing where comparisons should be clear.
- Teaching — examples like "the heart is like a pump" make ideas accessible.
- Lyrics, narrative description, anywhere the ear is following along.
Choose Metaphor if:
- Poetry, essays, opinion pieces — anywhere a stronger image carries weight.
- Headlines and slogans ("this product is your secret weapon").
- Philosophical or compressed writing — metaphors do a lot of work in a few words.
Worked example
Simile: "Reading the report was like wading through mud." The reader pictures both reading and wading, sees the comparison being made, and gets the point. Metaphor: "Reading the report was a swamp." Punchier; the reader doesn't step back to see two things — the report just is a swamp for that moment. Same idea, two different rhetorical strategies.
Common Mistakes
- "All comparisons with "like" are similes." Almost — but not literal comparisons. "This phone is like the one I had before" is a literal comparison, not a simile.
- "Metaphors are always literary." They're everyday: "falling in love," "running a business," "weighing your options" — all metaphors.
- "A metaphor is just a stronger simile." They're different rhetorical moves with different effects, even when the underlying comparison is the same.