straight life insurance has 2 distinct synonyms spread across 1 of its 1 sense. Each sense below keeps its own list, because a synonym belongs to a meaning and not to a word: swapping one sense's substitute into another sense's sentence is how a thesaurus makes writing worse. WordNet records no antonym for it — antonymy is a relation between word forms rather than concepts, so it is deliberately sparse.
Counts are distinct word forms across every sense. A synonym that appears under three senses is counted once here and shown three times below, under each sense it belongs to.
insurance on the life of the insured for a fixed amount at a definite premium that is paid each year in the same amount during the entire lifetime of the insured
Synonyms, antonyms and the broader and narrower relations for straight life insurance come from Princeton University’s WordNet. Full sources and licences.