Definition of assonate in US English:

assonate

verb

[no object]
  • (of a word or line) have a sound, especially a vowel sound, that corresponds to another.

    ‘the device recurs in stanza III, using fail to assonate with rain’
    ‘all the lines rhyme or assonate’
    ‘the assonating phrase sweet sleep’

Origin

Early 17th century: from Latin assonatus, past participle of assonare (see assonance).

Pronunciation

assonate

/ˈæsəˌneɪt//ˈasəˌnāt/