masculine and feminine rhymes

If I'm not mistaken, that's a borrowing from romance languages, which have rhyming phrase endings. For example, in Italian, phrases virtually always end with an 'a' or an 'o', and those are markers that can be altered by the gender/occupation of a speaker (yes, in romance languages, everything is gendered!). Phrases that end with an 'o' are masculine. Prases that end with an 'a' are feminine. That's my rhyming instinct. In English, that works out to masculine rhymes = rhymes that depend on the final syllable. feminine rhymes = rhymes that hinge on an accented vowel before the final syllable. In terms of the strictness of a feminine rhyme, people sort-of view that differently, and it's a rather personal choice. It's possible to alter some consonants while maintaining the vowel sounds; most people would consider that to be a perfect rhyme, even though it's slightly imperfect.