Is “Underlay” a Scrabble word?
Yes
UNDERLAY
Valid in at least one Scrabble dictionary
Valid in these dictionaries
SOWPODS / CSW
Scrabble UK & International
TWL / NWL
Scrabble North America
Large English Dictionary
General English word list
Meaning of Underlay
/ʌndəɹˈleɪ/
verb
1.To lay (something) underneath something else; to put under.
2.To provide a support for something; to raise or support by something laid under.
“to underlay a cut, plate, or the like, for printing”
3.To put a tap on (a shoe).
Synonyms: hade
verb
1.To lie in a position directly beneath.
2.To lie under or beneath.
“A stratum of clay underlies the surface gravel.”
3.To serve as a basis of; form the foundation of.
“a doctrine underlying a theory”