English homophones

2/to/too/two

"2" is a preposition; "to" is a particle - grammar picks the spelling, not sound. Size rank #5 of 1,007 English groups.

Data vintage 2026-09-03

Grammar picks the spelling

Same sound, different grammar: "2" arrives as a preposition, while "to" is a particle. Once the sentence role is fixed, only one spelling fits.

Spelling pairs in this cluster

No shared spelling stem: "2" is 1 letters, "to" is 2; only the sound ties them.
No shared spelling stem: "2" is 1 letters, "too" is 3; only the sound ties them.
No shared spelling stem: "2" is 1 letters, "two" is 3; only the sound ties them.
Shared stem "to" then splits - "to" (2 letters) vs "too" (3).
No shared spelling stem: "to" is 2 letters, "two" is 3; only the sound ties them.
No shared spelling stem: "too" is 3 letters, "two" is 3; only the sound ties them.

Orthographic DNA of this cluster

Shared letters across 2, to, too, two: none. Private letters are the ones only one spelling owns: the eye's fastest tell once sound is out of the picture.

2
0 letters · 0 vowels · shape
Inventory - · no private letters vs siblings
to
2 letters · 1 vowels · shape CV
Inventory ot · private ot
too
3 letters · 2 vowels · shape CVV
Inventory ot · private ot
two
3 letters · 1 vowels · shape CCV
Inventory otw · private otw

Pick the spelling from the meaning

Write "2" when you mean: Abbreviation of to.
Write "to" when you mean: A particle used for marking the following verb as an infinitive.
Write "too" when you mean: Likewise.
Write "two" when you mean: A numerical value equal to 2; this many dots (••).

Each spelling

preposition · /tuː/ · #103 frequency

Abbreviation of to.

particle · /tuː/ · #2 frequency

A particle used for marking the following verb as an infinitive.

too

adverb · /tuː/ · #121 frequency

Likewise.

two

num · /tu/ · #86 frequency

A numerical value equal to 2; this many dots (••).

Nearby English homophone groups

What to do next

You've reviewed the 4-spelling cluster (2, to, too, two). Here's where to go from here.

"to" is the most frequent headword in this 4-spelling cluster (rank #2 in English). Full entry
Among English homophone groups, a cluster of 4 spellings ranks #5 by size (1,007 groups in this vintage). Corpus statistics
Explore a nearby 4-spelling cluster: sigh · sai · Sy · sie. Nearby cluster
Grammar often disambiguates this cluster, match the meaning to the part of speech before picking a spelling. Pick by meaning

PlainSpell is a reference corpus, not spelling advice. Verify unusual forms in context.