finë (1) (stem *fini-, given the primitive form ¤phini) noun "a hair" _(PM:340, PE17:17) or "larch" (SPIN)_
lock of hair, tress
findl noun "lock of hair, tress" (but findil elsewhere in LotR-style Quenya, no word can end in -dl). (LT2:341)
findë (1) noun "hair" (especially of the head) (PM:340), "a tress or plait of hair" (PM:345), "tress, braid of hair, lock of hair" (SPIN)
findelë noun "tress, lock" (PE17:119); apparently a synonym of findë #1, q.v.
single hair, filament
phin- noun "a single hair, filament" (PE17:17); this is may be seen as an "element" rather than a regular word; the spelling ph rather than f is unusual for Quenya. See fine.
loxë (1) ("ks")noun "hair" (LOK). In later sources Tolkien uses findë, findessë, findilë for "hair", leaving the conceptual status of loxë uncertain.