Raudsüdame (Raudsüda)
Lit. Ironheart. The geological name of an approx. 20-cm-thick Estonian limestone bed from the Darriwilian (Middle Ordovician), dating back to 462.6 to 463 Ma, known locally as the Lasnamägi Lade (Lasnamägi Stage). New street in Uuslinn, named for the limestone mined in the former Lõunamurd quarry (lit. south quarry) south of Laagna tee. See also its geologically younger counterpart Muldvalge.
Muldvalge (Muldvalge)
Lit. Earthwhite. The geological name of an approx. 50-cm-thick Estonian limestone bed from the Darriwilian (Middle Ordovician), dating back to 460.9 to 462.6 Ma, known locally as the Uhaku Lade (Uhaku Stage), usually divided into 30-cm upper (pealmine) and 20-cm lower (alumine) layers. New street in Uuslinn, named for the limestone mined in the former Lõunamurd quarry (lit. south quarry) south of Laagna tee. See also its geologically older counterpart Raudsüdame.
Kassitatra (Kassitatar)
Possibly dialectal version of harilik kassitapp, the field or common bindweed, aka withy wind, small-flowered morning glory, creeping Jenny, possession vine, etc., Convolvulus arvensis, sole variety of Estonia. At first/last: Kivi seems to have made a mistake: street not in Tallinn but nearby Muuga. No, current information on the exact border of Tallinn is more precise than it was in the 70s, where Kivi does include streets which are now quite clearly outside the city limits.
Smurfide (Smurfid, pl.)
Smurfs, sing. Smurf. No such place, never was, never will be. Bright-blue Belgian comic characters.