bottleneck Get Printable Handwriting (bot-tle-neck) 3 syllables Rhymes Learn It! Spelling Test Definition noun. the neck of a bottle any place; as a narrow road; where traffic is slowed up or halted any point at which movement or progress is slowed up Example Sentence I can see the road start to bottleneck. Synonyms obstruct; blockade; block; hinder Antonyms fast paced; moving along Rhymes Three Syllable Rhymes (1) bottleneck Share with your friends: