Here are some examples:
bang and clang bind and bond blare and glare burble, bubble, gurgle, and gargle chock and chuck cinch and clinch clap and clop click and clack dandle and dangle dank and damp dribble and drizzle elegant and eloquent flip, flap, flop, plop, and glop foundering and floundering gabbing, gabbling, and babbling hank and hunk harping and carping hiccough and hiccup jabber and jibber, and gibberish and blabber ketchup and catsup persnickety and pernickety pratfall and pitfall prick up your ears, perk up your ears, and pick up your ears pronking and pronging sassy and saucey sled and sledge slob and slop sniff and snuff snip and snap snooty, snotty, and snouty
Jules Berman
tags: synonyms, synonymy, language, spelling, orthography, pleionyms, plesionymy, onomatopoeia, wordplay, writing