addition, affix, allonge, appendix, approximation, aside, cadenza, coda, codicil, commentary, differentiation, division, embedment, enclitic, entrance, envoi, epilogue, episode, equation, evolution, extempore, extrapolation, flourish, graft, grafting, hot lick, impaction, impactment, implantation, impromptu, improvisation, infix, infixion, infusion, injection, inoculation, insert, insertion, insinuation, integration, intercalation, interjection, interlineation, interlocution, introduction, intromission, inversion, involution, lick, marginalia, multiplication, notation, note, obiter dictum, parenthesis, penetration, perfusion, postscript, practice, prefix, proclitic, proportion, reduction, remark, rider, riff, scholia, side remark, subtraction, suffix, tail, tessellation, tossing-in, transformation, transplant, transplantation, vamp