"A Woman's Last Word" contains quite a bit of repetition, which helps draw attention to its major themes. For example, the speaker calls her partner "Love" throughout the poem (as in, "Let's contend no more, Love," and, "All be as before, Love"). This repetition creates a soothing, even hypnotic cadence. "Love" is a common pet name and it makes sense that the speaker is using this affectionate word to calm her partner down before bed and convince him to set aside their argument for the night.
Much of the poem's repetition takes the form of diacope. Take "Cheek on cheek" in line 12, where the repetition of "cheek" brings the image the speaker is describing to life: the arrangement of those words on the page evokes the speaker and her partner pressing their faces together.
The diacope of "false" in stanza 4 is also evocative:
What so false as truth is,
False to thee?
The speaker is saying that truth seems "false"—like a lie—but then she qualifies this statement: it only seems so "to thee," to her partner. She understands that the "truth" of the matter is going to be left to his discretion. The repetition of "false" emphasizes his disinclination to believe anything she has to say.
The most repetition-heavy stanza in the poem is stanza 7. This makes sense, given that in these lines the speaker is declaring her intention to do whatever he lover tells her to do:
Teach me, only teach, Love!
As I ought,
I will speak thy speech, Love,
Think thy thought—
There are a couple of different kinds of repetition in these lines: more diacope (the repetition of "Teach," "Love," and "thy"); polyptoton (the repetition of words that share a root: "speak" and "speech" and "Think" and "thought"); and general parallelism ("speak thy speech," "Think thy thought"). Altogether, this intensely repetitive language mirrors what the speaker is saying to her lover: in order to smooth things over, she's willing to give up her thoughts and opinions and adopt his instead, if he'll only forgive her and come to bed. Indeed, the diacope of "thy" hammers home that the speaker is handing the reigns over to her partner here: it will be "thy speech" and "thy thought" that shapes the conversation moving forward.
Given this context, the repetition of "Love" feels a little more loaded in this stanza. Now, it sounds like the speaker is not just using a term of endearment because she loves her partner, but also because she's afraid of what will happen if he doesn't calm down and let this go.