Synonyms for T-shirt:

n.

dress shirt, kaftan, kurta, boob tube, kameez, crop top, dickey. •artifact (noun)
tee shirt, jersey.
•clothing (noun)
halter, fez, frock, jersey, overcoat, clothes, dress, turtle-neck, doublet, pants, kilt, jacket, smoking jacket, scarf, pea coat, homburg, skirt, afghan, attire, caftan, sweat suit, slacks, raincoat, windbreaker, shirt, dinner jacket, coat, headdress, clothing, vesture, camisole, trousers, trench coat, panties, chapeau, garb, bowler, jumper, tuxedo, corset, greatcoat, evening gown, footgear, apparel, habit, topcoat, boot, mackintosh, sarong, ulster, poncho, sari, kimono, shorts, raiment, blue jeans, wrapper, shawl, housecoat, garment, v neck, gown, costume, pyjamas, pull over, parka, blouse, robe, sports coat, bonnet, suit, beret, ensemble, nightgown, outfit, fedora, sweater, stockings, burnoose, chemise, pillbox, smock, array, bathrobe, fur, brassiere, tunic, stetson, pinafore, blazer, vestment, duds, dressing gown, sweat shirt, pajamas, wrap, cape, hat, petticoat, shoes, cloak, crinoline, slicker, trimming.
•t-shirt (noun)
tee shirt, jersey.

Other synonyms:

•Other relevant words:
tee shirt, kaftan, kurta, dickey, kameez.