Evaluates phonetic predictability using the Metaphone algorithm, which converts words to phonetic codes. The score examines how phonetically distinct and clear each word is, along with how phonetically distinct multiple words are from each other.

The score combines:

• Ratio of unique phonetic characters to total length for each word
• Phonetic distinctness between words (for multi-word domains)

Evaluates clarity based on the Carnegie Mellon University Pronouncing Dictionary, which provides standardized phonetic transcriptions of English words. This measures both phonetic variety and distinctness between words.

The score combines:

• Variety of phonemes used (unique phonemes divided by total phonemes)
• Phonetic distinctness between words in multi-word domains

Evaluates clarity based on International Phonetic Alphabet (IPA) transcription principles. The system creates simplified phonetic encodings that approximate how words sound phonetically.

The score measures:

• Phonetic richness (entropy and variety of phonetic units)
• Phonetic distinctness (Levenshtein distance between phonetic encodings)
• Applies special handling for single words vs. multiple words

Evaluates basic phonetic patterns using simple heuristics that penalize potentially confusing patterns and reward clarity-enhancing patterns.

The score considers:

• Repeating characters (penalized)
• Ambiguous letter combinations (penalized)
• Vowel-consonant alternation (rewarded)
• Domain length (shorter domains rewarded)