Here's what rhymes with briefly.
chiefly Words that almost rhyme with briefly
measly naively leafy bleakly easy deeply freely iii treaty weekly keenly neatly weakly cheaply dreamy feebly obliquely priestly cleanly ity leaky meekly breezy iiii meanly seemly mealy reedy beefy briny preachy fleetly greenly sleekly greenfly lychee wheelie blini wheelies seemlier biyearly preachier viii greedy ideally needy routinely uniquely greasy sleepy steeply sweetly beastly creamy nisi fieri genie genii gipsy libri seedy steely weedy beady biweekly cheeky cheesy creepy fleecy meaty peaty queenly sleazy tipi tsetse creaky kiwi midi seamy streaky teeny wheezy freaky weepy yeasty beanie freebie geeky peachy peaky phoebe sheeny sleety terrine tweedy weenie weeny chichi peewee teensy cliquey meanie weensy wienie meany weepie freebee peachier completely extremely query uneasy speedy specie discreetly entreaty leucine serine unseemly carinii steamy valine bikini queasy sneaky sweetie discretely unready genteelly uncleanly stormily dashiki screechy patinae unseemlier screechier tyrosine xviii unwieldy xxviii graffiti inferiorly nomine pontine principe xxxviii banditti martini squeaky zucchini leonine speakeasy squeegee wapiti barbarically umbilici semiyearly incompletely threonine indiscreetly saturnine kerosine fettuccine gaberdine linguine semiweekly tortellini signorine methionine