Poems rhyme and sonnets don't that much also poems have stanzas and sonnets dont
Tau·tol·o·gy<span>tôˈtäləjē/</span>nounthe saying of the same thing twice in different words, generally considered to be a fault of style (e.g., they arrived one after the other in succession ).<span>synonyms:<span>pleonasm, repetition, reiteration, redundancy, superfluity, duplication"avoid such tautology as "let's all work together, everyone, as a team" by saying simply "let's work together""</span></span><span>a phrase or expression in which the same thing is said twice in different words.plural noun: tautologiesLOGICa statement that is true by necessity or by virtue of its logical form.</span>
True this is used to combine them so that they make sense and give a fuller meaning/description to it
