plumb — J(ohn) H(arold) 1911–2001, British historian.
rum — Arabic name of Rome, once used to designate the Byzantine Empire.
scum — a film or layer of foul or extraneous matter that forms on the surface of a liquid.
slum — Often, slums. a thickly populated, run-down, squalid part of a city, inhabited by poor people.
some — being an undetermined or unspecified one: Some person may object.
strum — to play on (a stringed musical instrument) by running the fingers lightly across the strings.
stum — unfermented or partly fermented grape juice.
sum — the aggregate of two or more numbers, magnitudes, quantities, or particulars as determined by or as if by the mathematical process of addition: The sum of 6 and 8 is 14.
come — When a person or thing comes to a particular place, especially to a place where you are, they move there.
crumb — Crumbs are tiny pieces that fall from bread, biscuits, or cake when you cut it or eat it.
cum — used between two nouns to designate an object of a combined nature
drum — a musical percussion instrument consisting of a hollow, usually cylindrical, body covered at one or both ends with a tightly stretched membrane, or head, which is struck with the hand, a stick, or a pair of sticks, and typically produces a booming, tapping, or hollow sound.
bass drum — a large shallow drum of low and indefinite pitch
bay rum — an aromatic liquid, used in medicines and cosmetics, originally obtained by distilling the leaves of the bayberry tree (Pimenta racemosa) with rum: now also synthesized from alcohol, water, and various oils
beach plum — a rosaceous shrub, Prunus maritima, of coastal regions of E North America
become — If someone or something becomes a particular thing, they start to change and develop into that thing, or start to develop the characteristics mentioned.
black gum — a tall, deciduous tupelo (Nyssa sylvatica) with sour purple fruits and leaves that turn scarlet in the fall, found in moist forests of the E U.S.
blue gum — a tall fast-growing widely cultivated Australian myrtaceous tree, Eucalyptus globulus, having aromatic leaves containing a medicinal oil, bark that peels off in shreds, and hard timber. The juvenile leaves are bluish in colour
brake drum — the cast-iron drum attached to the hub of a wheel of a motor vehicle fitted with drum brakes
bubble gum — Bubble gum is a sweet substance similar to chewing gum. You can blow it out of your mouth so it makes the shape of a bubble.
ghost gum — a eucalyptus tree with white trunk and branches
green thumb — an exceptional aptitude for gardening or for growing plants successfully: Houseplants provide much pleasure for the city dweller with a green thumb.
snare drum — a small double-headed drum, carried at the side or placed on a stationary stand, having snares across the lower head to produce a rattling or reverberating effect.
snow gum — any of various eucalyptus trees that grow at high altitude, esp Eucalyptus pauciflora
steel drum — Music. a bowl-shaped percussion instrument common in the West Indies, made from a steel barrel divided into sections producing different notes when struck.
succumb — to give way to superior force; yield: to succumb to despair.
sweet gum — a tall, aromatic tree, Liquidambar styraciflua, of the eastern U.S., having star-shaped leaves and fruits in rounded, burlike clusters.
cherry plum — a small widely planted Asian rosaceous tree, Prunus cerasifera, with white flowers and red or yellow cherry-like fruit
chewing gum — Chewing gum is a kind of sweet that you can chew for a long time. You do not swallow it.
direct sum — a composition of two disjoint sets, as vector spaces, such that every element in the composition can be written uniquely as the sum of two elements, one from each of the given sets.
flooded gum — any of various eucalyptus trees of Australia, esp Eucalyptus saligna (the Sydney blue gum), that grow in damp soil
natal plum — a southern African bushy shrub, Carissa grandiflora, of the dogbane family, having forked spines, white flowers, and egg-shaped, red berries.
rule of thumb — a general or approximate principle, procedure, or rule based on experience or practice, as opposed to a specific, scientific calculation or estimate.
spirit gum — a glue used in fastening false hair, as a beard or mustache, to an actor's skin.
spotted gum — an Australian eucalyptus tree, Eucalyptus maculata
vector sum — the vector obtained by applying vector addition to two or more given vectors.
water gum — any of several Australian trees of the myrtle family, growing near water.
Four-or-more syllable rhymes
jamaica rum — a heavy, pungent, slowly fermented rum made in Jamaica.
japanese plum — a small tree, Prunus salicina, native to China, bearing edible yellowish fruit.