Monosyllable: A word with only one syllable (e.g., cat, dog, run).
Disyllable: A word with two syllables (e.g., apple, table).
Monophthong: A single, pure vowel sound (e.g., /i/, /ɪ/), not related to syllable count.
Monometer: A line of poetry with one metrical foot, not related to word syllables.
🔹 Therefore, a word with one syllable is called a monosyllable.