Unguarded rhymes with:
disregarded, bombarded, discarded, disregarded, larded, retarded, accorded, bombarded, discarded, disregarded, hoarded, larded, prerecorded, retarded, rewarded, safeguarded, unrecorded, warded
Unguarded sounds like:
unaccredited, unanswered, uncharted, uncured, uninjured, uninsured, unsecured, unsworth