Astro rhymes with:
belcastro, castro, decastro, delmastro, gastro, locastro, mastro, nicastro, policastro, verrastro, yastrow, zastrow
Astro sounds like:
accusatory, aciduria, actor, actuary, actuator, acustar, agitator, akhtar, ashtray, astaire, aster, astor, astore, astoria, astra, astray, auchter, auster, austere, austria, austro, aztar