【Offensive】 ,  【loathsome】 ,  【repulsive】 ,  【repugnant】 ,  【revolting】  are comparable when they mean utterly distasteful or repellent.

Something  【offensive】 subjects one to painful or highly disagreeable sensations. Sometimes the term implies injured feelings as a result of an affront or insult and frequently it suggests the evocation of such aversion that endurance involves mental strain or moral distaste or it may imply a vileness (as of appearance or odor) that excites nausea or extreme disgust.

Something  【loathsome】 is so foul or obscene that one cannot look upon it, hear it, feel it, or have to do with it without a sense of deep disgust and abhorrence. Often the term is not clearly distinguishable from  【offensive】  in the sense of disgustingly nauseating but is applied more often to things which are generally or universally distasteful; thus, some people find the heavy fragrance of tuberoses  【offensive】 , but nearly everyone finds the sight and odor of meat rotting and crawling with maggots  【loathsome】 .

Something  【repulsive】 is so ugly in its appearance or so completely lacking in all that attracts or allures or charms or even challenges interest that it either drives one away or makes one unwilling to dwell on it.

Something  【repugnant】  (see also  【REPUGNANT】 1 ) is highly 【offensive】 or 【loathsome】 because in direct conflict with one's nature, one's principles, and one's tastes and irreconcilable with them.

Something  【revolting】 is so extremely 【offensive】 , 【loathsome】 , 【repulsive】 , or 【repugnant】 to a person of delicate sensibilities that the sight or thought of it arouses in him a desire or determination to resist or rebel.