consonant vs constant, What's the Difference?

Which to use

“consonant” is a noun and “constant” is an adjective - they look or sound alike but fill different roles in a sentence.

#25,715
“consonant” frequency rank: #2,781
“constant” frequency rank: 28496
confusion score

Side-by-Side Comparison

Feature	consonant	constant
Definition	A sound that results from the passage of air through restrictions of the oral cavity; any sound that is not the dominant sound of a syllable, the dominant sound generally being a vowel.	Unchanged through time or space; permanent.

Where the spellings diverge

Shared letters are muted; the letters that actually set consonant and constant apart are highlighted. They share 7 letters in sequence, which is exactly why the eye skips the difference.

9 ch

consonant

8 ch

constant

Spelling & Dictionary Insight

consonant and constant form a confusable pair in the English index, two distinct headwords that are easily confused because they look alike, sound alike, or both. They differ by 1 letter(s) in length - close enough that the eye skips over the difference, far enough that meaning fully diverges. Our composite confusion score for this pair is 28496, derived from the frequency rank of both members and their visual similarity.

consonant is recorded at frequency rank #25,715, classified as anoun, pronounced /ˈkɒn.sə.nənt/. constant is at rank #2,781, tagged as anadj, pronounced /ˈkɒnstənt/.

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 28496, this pair ranks #370,612 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.

Frequency comparison

consonant#25,715

constant#2,781

Source: FrequencyWords open word-frequency list

Frequently Asked Questions

Can "consonant" and "constant" be used interchangeably?

No, "consonant" and "constant" have distinct meanings and cannot be swapped without changing the meaning of a sentence. Understanding the specific definition and context for each word is essential for correct usage.

Remembering consonant vs constant

The fastest way to pick the right one every time.

Check the role first: if you need a noun, it's “consonant”; for an adjective, it's “constant”.
See each word in full, definition, IPA, etymology and its other confusables. Full “consonant” entry
Browse more pairs most likely to be confused. Most confusable