túr, tur noun "king" (PE16:138, LT1:260); rather aran in LotR-style Quenya, but cf. the verb tur-. Also compare the final element -tur, -ntur "lord" in names like Axantur, Falastur, Fëanturi, Vëantur (q.v.)
Quenya
-tur
suffix. master, lord, ruler, master, lord, ruler, [ᴹQ.] victor
-tar
king
túr
king
aran
king
aran noun "king"; pl. arani (WJ:369, VT45:16, PE17:186); gen.pl. aranion "of kings" in asëa aranion, q.v.; aranya "my king" (aran + nya) (UT:193). Aran Meletyalda "king your mighty" = "your majesty" (WJ:369); aran Ondórëo, "a king of Gondor" (VT49:27). Also in arandil "king's friend, royalist", arandur "king's servant, minister" (Letters:386); Arantar masc. name, "King-Lord" (Appendix A); Arandor "Kingsland" region in Númenor (UT:165); the long form Arandórë appears as a name of Arnor in PE17:28 (elsewhere Arnanórë, q.v.) Othercompounds ingaran, Noldóran, Núaran, q.v.
aran
noun. king
haran
king, chieftain
haran (#harn-, as in pl. harni) noun "king, chieftain" (3AR, TĀ/TA3, VT45:17; for "king", the word aran is to be preferred in LotR-style Quenya). In a deleted entry in the Etymologies, haran was glossed "chief" (VT45:17)
taran
king
taran (1) noun "king", possibly ephemeral variant of aran, q.v. (PE17:186)
turu-
master, defeat, have victory over
turu- (1) vb. "master, defeat, have victory over" (PE17:113, not clearly said to be Quenya, but the Q name Turucundo "Victory-prince" is listed immediately afterwards). Compare tur-; cf. also *turúna.
tár
king
tár noun "king" (only used of the legitimate kings of whole tribes); the pl. tári "kings" must not be confused with the sg. tári "queen" (TĀ/TA3). Prefix tar-, compare -tar above. The normal Quenya word for "king" is aran, but compare Tarumbar.
vardar
king
vardar noun "king" (LT1:273; rather aran in LotR-style Quenya)
eldatár
`Vm#1~C6 noun. elf-king, elfking, elven-king
-tar or tar-, element meaning "king" or "queen" in compounds and names (TĀ/TA3), e.g. Valatar; compare the independent nouns tár, tári. Prefix Tar- especially in the names of the Kings and Queens of Númenor (e.g. Tar-Amandil); see their individual names (like Amandil in this case), cf. also Tar-Mairon "King Excellent", title used by Sauron (PE17:183). Also in Tareldar "High-elves"; see also Tarmenel.