ideas

The filled squares are the 3 vowels — 3 of 5 letters. In the size-ranked list, ideas sits in the everyday tier.

Letters

58,636 words share the length

Syllables

3stress on the second

Anagrams

2aides, aside

One letter away

1ideal

Open English WordNet defines lemmas, and ideas is not one of them. The nearest lemma it does define is idea — the content of cognition; the main thing you are thinking about. The rule that found it is on the sources page; nothing here claims a grammatical relation.

The CMU Pronouncing Dictionary reads it as ay0 d iy1 ah0 z — 3 syllables, the stress on syllable 2.

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

• poinsettias
• tortillas
• pizzerias
• diarrheas

2 other words use exactly these letters: aides, aside.

The whole set on one page.

• ideal

Same length, one position changed. <1% of the 8,636 words this long are a neighbour.

• 5 letter words8,636
• Starts I6,978
• Starts ID172
• Ends S
• 5 letters starting I

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.