[heldo, also helmo, fem. heldë, noun "friend" (VT46:3)]
Quenya
-ser
friend
heldo
friend
meldo
friend, lover
meldo noun "friend, lover". _(VT45:34, quoting a deleted entry in the Etymologies, but cf. the pl. #_meldor in Eldameldor "Elf-lovers", WJ:412) **Meldonya *"my friend" (VT49:38, 40). It may be that meldo is the distinctly masculine form, corresponding to feminine #meldë** (q.v.)
meldë
friend
#meldë noun "friend", feminine (meldenya "my friend" in the Elaine inscription [VT49:40], Tolkien referring to Elaine Griffiths). Compare meldo.
sermo
friend
sermo noun "friend" (evidently masc., since sermë is stated to be fem.) (SER)
sermë
friend
sermë noun "friend" (fem.) (SER)
seron
friend
seron noun "friend" (SER)
-ndil
friend
-ndil (also -dil) ending occurring in many names, like Amandil, Eärendil; it implies devotion or disinterested love and may be translated "friend" (SA:(noun)dil); this ending is "describing the attitude of one to a person, thing, course or occupation to which one is devoted for its own sake" (Letters:386). Compare -ndur. It is unclear whether the names derived with the ending -ndil are necessarily masculine, though we have no certain example of a woman's name in -ndil; the name Vardilmë (q.v.) may suggest that the corresponding feminine ending is -(n)dilmë.
-ndur
friend
-ndur (also -dur), ending in some names, like Eärendur; as noted by Christopher Tolkien in the Silmarillion Appendix it has much the same meaning as -ndil "friend"; yet -ndur properly means "servant of" (SA:(noun)dil), "as one serves a legitimate master: cf. Q. arandil king's friend, royalist, beside arandur 'king's servant, minister'. But these often coincide: e.g. Sam's relation to Frodo can be viewed either as in status -ndur, in spirit -ndil." (Letters:286)
málo
noun. friend
friend, comrade
málo
friend
málo noun "friend" (MEL, VT49:22)
nildo
friend
nildo noun "friend" (apparently masc.; contrast nildë) (NIL/NDIL)
nildë
friend
nildë noun "friend" (fem.) (NIL/NDIL)
nilmo
friend
nilmo noun "friend" (apparently masc.) (NIL/NDIL)
sondo
friend
[sondo noun "friend" (VT46:15)]
-ser noun "friend" (SER)