Some words and abbreviations I know of:
10q, luq, dq, tq, rpq, Iraq, freq, irq, ruq, marq, oq, hq, rtfaq, inupiaq, compaq, deq, mikmaq, ahrq, pdq, gq, req, mcq, coq, mq, nvq, nasdaq, rfq, bq, 2b1q, cq, liq, q, iaq, bbq, unq, rq, eq, i.q, rlq, ghq, suq, boq, bfoq, colloq, wq, saq, jq, qepiq, mi'kmaq, esq, seq, posslq, lq, iq, uq, loq, qqq, obliq, gnvq, fq, sqq, uuq, nlq, aq, mashriq, cinq, sq, qq, enq, arq, icq, eoq, pq, llq, jasdaq, vq, nq, inq, faq, meq, mrq, seaq
suq
suq
Iraq and Shaq
The only two letter word using Q is 'QI', there's no two-letter word ending in Q.
Nonexistant
Iraq ends with a q
no
quart
NASDAQ
Iraq
Iraq
quick
suq
suq
There are no 4-letter words in English starting with L and ending in q. Iraq starts with I and ends in q.
Iraq
Iraq and Shaq