Okay, rowanisms, L. I'll go with la, 'the', itself even, as it is when we are teaching that we identify 'the' this and 'the' that; lago, 'lake', L's rune's name -- *lagu, if memory serves -- which is in (LF) lagua, 'water', and akin to lacrima, 'tear', no doubt; hah! laion (and Latin leo, of course), 'lion', since L at aquarius is the recumbent lion hieroglyph in Egyptian (meaning where the full moon is at when the sun is in aquarius, leo itself perhaps being considered a nonrecumbent lion); lampa, 'lamp', and lampo, 'lighting', of course (basic prerequisite of teaching); launchia, 'launch', perhaps, and surely largo, 'broad', and larghezza, 'breadth', an attribute of lakes (distinguishing them from puddles: "I am a wide flood on a plain" is one version of L's line in the Song of Amairgen in Graves [possibly his own wording]); lavorar/lavoro, 'work' (v./n.), relates learning (adjusting) to its trump, XIIII Temperance; lege, 'law', is part of what is taught; lento, 'slow', is how the teacher takes things at first, n'est ce pas? and lettera, 'letter', again part of one's lessons (another L-word); libero, libre, 'free', is what learning makes one; libro, 'book' is what one learns to read; limpiar, 'clean, wash', may be the previous month's (birch's, the year's birth) continuation in the learning process that comes next (B-L was the most common god-name used by ancient Phoenician and Keltic seafarers and colonists, in the 'New World' and elsewhere); lingua, 'language', again what one learns; liscio, 'plain, smooth', is how one must make one's explanations; locheza, 'foolishness', what L-rowan-learning or XIIII Temperance seeks to overcome; the lodevole or 'praiseworthy' is the crux of what is taught in the bardic sense (and should be in present tense, but is not); lucir, 'shine', perhaps; luna, 'moon'? (from aquarius being the completion of the primordial water triad, the one that points down towards libra, the ground); the lunetta, 'eyeglass', is for learning something; and luta, 'napkin', something one must be taught to use -- and that is actually most of the L-words!
Having covered one's L (left) or receptive side, I will spare you R, since it would be a more involved search.
T's holly-isms: taba, 'seal, stamp' (Arabic), stands for Phoenician T-tav as one's "X" or mark (with which it is surely cognate); tobacco is considered martial by occultists (T-holly is the Mars-like antagonist opposed to the Jupiter-like D-oak protagonist); taca/tacar, 'stain' (n./v.), is the stain of evil (being antagonist); talento replaces 'ethical high ground' as one's strength (in the waning year of the anti-hero or holly-king); talone, 'heel', is where the antagonist of the Iliad 'got it' (though this incident is not in the Iliad); tardar, 'be late', and tardi, 'late', are perhaps from holly's ruling the 2nd half of the year, not the 1st half; tre, 'three' -- terzo, 'third', is where T falls in its group-of-five in ogham evidently precisely because the sequence H-D-T-C-Q yields the initials of the first five numbers in Keltic --; tiranno, 'tyrant', etc. mean antagonist; tocar, 'beat, touch; strike, fire (a weapon)', is martial; tornar/torno, 'turn' (v./n.), since the 2nd half of the year turns back towards shorter days; ('torent', and the earlier 'storm', since D and T both represent storm gods); traidor, 'traitor', another antagonist; tremar, 'tremble', and tributir, 'give tribute', also relate; and so on (outta time).