mairëa adj. "beautiful" (of things made by art) (PE17:163). An alternative (and peculiar) form "mairia" is also implied in the source.
Quenya
calwa
beautiful
mairëa
beautiful
mírya
beautiful
mírya adj. "beautiful" (of work of art only) (PE17:165)
vanima
adjective. beautiful
vanima
beautiful, fair
vanima adj. "beautiful, fair" (BAN, VT39:14) (glossed "proper, right, fair" in early "Qenya", LT1:272, though a later source says the word is used "only of living things, especially Elves and Men", PE17:150); nominal pl. vanimar "beautiful ones", partitive pl. genitive vanimálion, translated "of beautiful children", but literally meaning *"of [some] beautiful ones") (LotR3:VI ch. 6, translated in Letters:308). Arwen vanimalda "Beautiful Arwen", literally "Arwen your beauty" (see -lda for reference; changed to Arwen vanimelda in the second edition of LotR; see vanimelda).
lelya
delicate, beautiful & fine, slender; lovely
lelya (2) adj. "delicate, beautiful & fine, slender; lovely" (PE17:139, 151)
melwa
lovely
melwa adj. "lovely" (LT1:262); compare melda in Tolkiens later Quenya.
írima
lovely, beautiful, desirable
írima adj. "lovely, beautiful, desirable" (ID, FS, PE17:155), in FS also pl. írimar; in the "Qenya" of Fíriel's Song, adjectives in -a form their plurals in -ar instead of -ë as in LotR-style Quenya.
calwa ("k") adj. "beautiful" (LT1:254)