open

The filled squares are the 2 vowels — 2 of 4 letters. In the size-ranked list, open sits in the everyday tier.

Letters

43,903 words share the length

Syllables

2stress on the first

Anagrams

3peon, nope

One letter away

5omen, oven

• adjectiveaffording unobstructed entrance and exit; not shut or closed
• adjectiveaffording free passage or access
• adjectivewith no protection or shield

The CMU Pronouncing Dictionary reads it as ow1 p ah0 n — 2 syllables, the stress on syllable 1.

2 words share everything from the last stressed vowel on — that is what counts as a rhyme here.

• reopen
• copen

3 other words use exactly these letters: peon, nope, pone.

The whole set on one page.

• omen
• oven
• oxen
• oped
• opes

Same length, one position changed. <1% of the 3,903 words this long are a neighbour.

• 4 letter words3,903
• Starts O5,843
• Starts OP334
• Ends N
• 4 letters starting O

Tier: everyday. The tiers come from the English Speller Database and rank by list size, not by how often a word is used — see where the words come from.