Periodontology is a related term of periodontium.

As nouns the difference between periodontology and periodontium

is that periodontology is (dentistry) periodontics while periodontium is the specialized tissues that both surround and support the teeth, maintaining them in the maxillary and mandibular bones; the tissues including alveolar bone, cementum, gums and periodontal ligament.

As a proper noun little

is .

As a noun bratling is

(weeping milk cap) ((taxlink)).

As nouns the difference between brat and bratling

is that brat is brother while bratling is (weeping milk cap) ((taxlink)).

As nouns the difference between antiparticle and antimeson

is that antiparticle is (particle) a subatomic particle corresponding to another particle with the same mass, spin and mean lifetime but with charge, parity, strangeness and other quantum numbers flipped in sign while antimeson is the antiparticle corresponding to a meson.

As nouns the difference between meson and antimeson

is that meson is while antimeson is the antiparticle corresponding to a meson.

As nouns the difference between antiparticle and antimuon

is that antiparticle is (particle) a subatomic particle corresponding to another particle with the same mass, spin and mean lifetime but with charge, parity, strangeness and other quantum numbers flipped in sign while antimuon is the antiparticle corresponding to a muon.

As nouns the difference between muon and antimuon

is that muon is (label) while antimuon is the antiparticle corresponding to a muon.

As a verb perfume

is .

As a noun citronellol is

a natural acyclic monoterpenoid, occurring in citronella oils and used in perfumes and insect repellents.

As nouns the difference between insect and citronellol

is that insect is an arthropod in the class insecta, characterized by six legs, up to four wings, and a chitinous exoskeleton while citronellol is a natural acyclic monoterpenoid, occurring in citronella oils and used in perfumes and insect repellents.

As nouns the difference between repellent and citronellol

is that repellent is someone who repels while citronellol is a natural acyclic monoterpenoid, occurring in citronella oils and used in perfumes and insect repellents.

As an adjective repellent

is tending or able to repel; driving back.