The rhymezone answers are not always that helpful, because they include a lot of rare proper names (not likely to help you much in a poem!) and phrases that end with the exact same word.

Leaving out words ONLY used as proper nouns, the only “perfect” rhyme I know of is:

mecca (that is, NOT used as the name of THE place [Mecca], but for ANY place people gravitate to or ‘go on pilgrimage’ to)

Your best bet in a case like this is usually to try the closest “near rhyme” that suits your purposes. Best approach is usually to use words in which the VOWEL sounds match (called “full assonance”) and the consonants come as close as possible. Words that INCLUDE the /k/ sound of “-ecca” along with another consonant could work, or words that substitute another sound that is somewhere close (for example, the /t/ sound is MUCH closer to /k/ than an /s/ would be).

So, in groups roughly from ‘nearer’ to ‘farther’ rhymes, you might try some of the following. (Unfortunately, a number of these are RARE words and so less likely to be useful. This MAY suggest you should recast your poem–re-order your words or whatever it takes– to place a word with more good rhyming option in the ‘rhyme position’.)

analecta, dejecta, ejecta, perfecta, recta, tecta, trifecta

anchovetta, arietta, beretta, betta, biretta, cabaletta, cabretta, mozetta, operetta, pancetta, sinfonietta, stretta, vendetta, meta

lepta, septa

argumenta, cementa, impedimenta, irredenta, irridenta, lomenta, magenta, menta, momenta, omenta, paramenta, placenta, polenta, ramenta, sarmenta, tegmenta, tomenta, unguenta, yenta

antenna, duenna, henna, penna, senna, sienna

addenda, agenda, corrigenda, credenda, definienda, fazenda, hacienda, referenda

plectra, spectra

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(If you speak with an accent that drops final r’s, you could also use another large set of words –and more familiar ones– though I would ONLY recommend it if you have someone WITHIN a poem clearly speaking with such an accent. [I can imagine this happening in a humorous setting like a limerick, for examples.] Then you could find more “perfect” rhymes, like:

checker, decker, necker, woodpecker, wrecker

and near rhymes, beginning with:

bisector, collector, connector, convector, corrector, defector, deflector, detector, director, ejector, elector, erector, hector, infector, injector, inspector, interjector, lector, objector, projector, prosector, prospector, protector, rector, reflector, rejector, sector, selector, vector)

decca, eka, klecka, mecca, pecka, zecca

3 syllables:

azteca, barreca, caleca, fonseca, lagreca, marceca, marseca, marseka, porreca, rebecca, rebekka, scimeca, tribeca

…Becca

…respect her

…Becca

…deflector

…Becca

….reflect her

…Becca

…elect a…

tether

better

betta

letter

pita

luisa