I . v. n.
1.
Chirp, chirrup.
2.
Flutter, be agitated, be flurried, be excited.
3.
Titter, giggle.
II . n.
1.
Twittering, chirping, chirp, chirruping.
2.
Trembling, agitation, tremor, flutter.
3.
Titter, giggle, half-suppressed laugh.
I . v. n.
1.
Chirp, chirrup.
2.
Flutter, be agitated, be flurried, be excited.
3.
Titter, giggle.
II . n.
1.
Twittering, chirping, chirp, chirruping.
2.
Trembling, agitation, tremor, flutter.
3.
Titter, giggle, half-suppressed laugh.
Soule. Dictionary of English synonyms. Словарь английских синонимов. 2012