- Metal-like Adj. Adv.
- Metallically Adv.
- Metallurgically Adv.
- Metamerically Adv.
- Metamorphically Adv.
- Metaphorically Adv.
- Metaphysically Adv.
- Metarecursively Adv.
- Metastatically Adv.
- Metatarsally Adv.
- Meteorically Adv.
- Meteorologically Adv.
- Methodically Adv.
- Methodologically Adv.
- Meticulously Adv.
- Metonymically Adv.
- Metrically Adv.
- Metrologically Adv.
- Metronomically Adv.
- Mezzo Subst. Adj. Adv.
- Microbiologically Adv.
- Microcosmically Adv.
- Microelectrophoretically Adv.
- Micromorphologically Adv.
- Microphysically Adv.
- Microradiographically Adv.
- Microscopically Adv.
- Microspectrophotometrically Adv.
- Microspherically Adv.
- Mid-flight Adj. Subst. Adv.
- Mid-October Subst. Adj. Adv.
- Mid-sentence Adj. Subst. Adv.
- Midchannel Adj. Subst. Adv.
- Middlemost Adj. Adv.
- Middling Subst. Adj. Adv.
- Middlingly Adv.
- Midmonth Adj. Subst. Adv.
- Midmost Adj. Adv. Subst.
- Midsea Adj. Subst. Adv.
- Midships Adv. Adj.
- Midstream Adj. Subst. Adv.
- Midway Adj. Adv. Subst.
- Midweek Adj. Subst. Adv.
- Midweekly Adj. Adv.
- Midyear Adj. Subst. Adv.
- Mightily Adv.
- Mighty Adj. Adv. Subst.
- Mildly Adv.
- Militantly Adv.
- Militarily Adv.
- Milkily Adv.
- Millionfold Adj. Adv.
- Mimetically Adv.
- Mincingly Adv.
- Mindedly Adv.
- Mindfully Adv.
- Mindlessly Adv.
- Mineralogically Adv.
- Minimalistically Adv.
- Minimally Adv.