tubing Get Printable Handwriting (tub-ing) 2 syllables Rhymes Learn It! Spelling Test Definition noun. 1 material in the form of a long pipe; 2.the sport or recreation of floating down a river or stream on an inner tube Example Sentence I went tubing on the lake. Synonyms pipe; cylinder; floating on an inner-tube Antonyms small box; flying Rhymes Two Syllable Rhymes (1) tubing Share with your friends: