knife-handle knife-handle /naɪf ˈhændəl/

noun

1. Marine clam having a long narrow curved thin shell  ( jackknife clam , knife-handle , razor clam )
   marine clam having a long narrow curved thin shell
   
   

 football football /ˈfʊtˌbɔl/

noun

1. () Any of various games played with a ball (round or oval) in which two teams try to kick or carry or propel the ball into each other's goal  ( football game , football )
   any of various games played with a ball (round or oval) in which two teams try to kick or carry or propel the ball into each other's goal
    Football is the most popular sport in the world
   Football is the most popular sport in the world
   
   
2. () The inflated oblong ball used in playing American football  ( football )
   the inflated oblong ball used in playing American football
    The football spiraled through the air on its way to the receiver
   The football spiraled through the air on its way to the receiver
   
   

 portal tomb portal tomb /ˈpɔːrtəl toʊm/

noun

1. A prehistoric megalithic tomb typically having two large upright stones and a capstone  ( cromlech , dolmen , portal tomb )
   a prehistoric megalithic tomb typically having two large upright stones and a capstone
   
   

 asclepiad asclepiad /əˈskliːpiːæd/

noun

1. Any plant of the family Asclepiadaceae  ( asclepiad )
   any plant of the family Asclepiadaceae